Holography applications toward medical field: An overview

Abstract

Purpose: 3D Holography is a commercially available, disruptive innovation, which can be customised as per the requirements and is supporting Industry 4.0. The purpose of this paper is to study the potential applications of 3D holography in the medical field. This paper explores the concept of holography and its significant benefits in the medical field. Methods: The paper is derived through the study of various research papers on Holography and its applications in the medical field. The study tries to identify the direction of research &development and see how this innovative technology can be used effectively for better treatment of patients. Results: Holography uses digital imaging inputs and provides an extensive visualisation of the data for training doctors, surgeons and students. Holography converts information about the body into a digital format and has the potential to inform, promote and entertain the medical students and doctors. However, it needs a large amount of space for data storage and extensive software support for analysis and skills for customising. This technology seems good to solve a variety of medical issues by storing and using patient data in developing 3D holograms, which are useful to assist successful treatment and surgery. It seems useful in providing flexible solutions in the area of medical research. Finally, the paper identifies 13 significant applications of this technology in the medical field and discusses them appropriately. Conclusion: The paper explores holographic applications in medical research due to its extensive capability of image processing. Holographic images are non-contact 3D images having a large field of depth. A physician can now zoom the holographic image for a better view of the medical part. This innovative technology can create advancements in the diagnosis and treatment process, which can improve medical practice. It helps in quick detection of problems in various organs like brain, heart, liver, kidney etc. By using this technology, medical practitioners can see colourful organs at multiple angles with better accuracy. It opens up an innovative way of planning, testing of procedures and diagnosis. With technological developments, compact hardware and software are now available to help medical research and related applications.

Keywords

3D image - applications - detection of disease - holography - imaging - planning - treatment

Introduction

Holography is an innovative technology that depicts an effective interaction of humans with the digital world. It is a disruptive innovation; where 3D imaging technologies are used effectively to address challenges in education, training, research, gaming and other associated areas. In the medical field, it can be used for surgical planning, medical diagnostics, radiology and also for obtaining better information about tissues and organs (internal and external) when viewed from various angles. It can record high-resolution images of tissues and internal organs. Holography seems to be a good tool to plan an intervention as it opens a new possibility due to its capability of non contact high-resolution imaging and measurement. It provides better information about cavities and deformities in internal organs. It helps physicians during the procedure for the fitting of implants.[1], [2]

In few industries, holography is used to protect against duplication of the product as it has an excellent capability for the inspection of the product. This technology is available to capture information about vehicles and their number plates. The other applications are in movies, video games etc. Holography is well used for the retail, military and other commercial applications. It assists specific instruction of the patient and eliminates checkup manually. Holography is used for the detailed study of different parts of ear; such as outer ear, middle ear and inner ear under various noisy conditions. It is used for various applications like cornea, tympanic membrane, tooth mobility, basilar membrane, temporal bone, cochlea, incudomalleal joint, skull, chest and bones.[3], [4]

In cardiology, it is suitable for the therapy of arrhythmias, coronary interventions and heart valve replacements. It provides fast growth to improve healthcare infrastructure[5], [6], [7] and endless possibilities in emergency medical care.[8], [9]

3D Holography and Its Basic Steps

In 1948, this technology was coined by Dr Dennis Gabor for which he received the Nobel Prize. The word hologram stands for ‘complete message’ which means the reconstruction of the image to convey complete message/information of the given part. Hologram refers to an image that is created when the light reflects upon meeting an object. Thus, it can be seen or obtained with the help of dense air like mist. A hologram is a permanent record of light, which is encapsulated in a three-dimensional object like glass or mirror. Hologram consist of two beams; a reference and an object beam which are diverted with the help of a half mirror and then the light converges forming a hologram using two full mirrors. This technique is used to perform imaging of multidimensional objects. Holography uses hardware, software and more exotic types of programming to create hologram image. This technology records light scattered from an object to present it in a 3D digital image. It allows light to shine through and the image is viewed from one side. The scattering of a laser beam produces multiple light waves that illuminate an object and create an image due to the principle of diffraction. It is recorded through a video camera in a 3D format. A hologram is a 3D photographic technique which projects image using 3D glasses.[1] Hologram diffracts light into an image and is easily projected for planning, teaching, learning and performing of complex surgeries. [Figure 1] shows the fundamental physics of 3D holography.

Figure 1: Basic physics of 3D holography

A laser is used to focus the light beam and this beam is further spat. By the spat of the laser beam, an object beam is developed which focusses on the mirror. This action finally provides a hologram of the object. This hologram can also be an image of a patient’s body part which can be used successfully in the medical field. The applications of this technology are also increasing in the movie industry.

Steps for using holography in the medical field

Holography provides better communication for humans due to the extensive capability of 3D visualisation of a patient’s body with high resolution. It is used to simplify the procedure of complex treatments. 3D hologram created by this technology is used for clinical applications by the health professionals. [Figure 2] shows the major steps for developing 3D holograms for clinical applications in the medical field.

Figure 2: Steps used by holography in the medical field

The first step is to install the required hardware and software for the preparation of the required medical image. This prepared image is then projected, by which one can see, a 3D hologram. This hologram is visualised by the doctors and surgeons for proper planning of the treatment which is applied for clinical applications and provides various benefits in the medical field.

Need for the Study

Holography is an innovative imaging technology which creates detailed imaging that can be used for different applications. In medical imaging, there is a requirement of imaging of internal and external human body parts. There are digital imaging technologies which provide 2dimensional and even 3D images of body parts. Thus, we need to go a step further to see these images in motions, with different scales, with different colours and with languages. Its applications are increasing in image processing and precisely measuring human body parts.

Literature gives us a good idea of the applications of holography used to measure the stress on surgical tools during surgery. It allows examining the different body parts like liver, brain, skeleton, heart, lungs, nerves, vascular system and muscles. It can digitally store patient data and provide a massive amount of detailed information.[10], [11] Thus, it is suitable for medical training, tumor localisation and remote therapy, visualisation and complex 3D structure measurement of the human body. In the medical field, holography is used to measure the natural cavity, organs and tissue of the human body in a non-destructive manner. This 3D visualising technology provides a unique experience to the doctor and offers empowerment to clinicians. It efficiently performs the studies of bones in a contactless manner.[12], [13]

The need is to understand holography, its basic functioning and identify its significant benefits in using it in the field of medicine. Further, we need to understand the benefits it can deliver to the practitioners. This will help readers to be aware of what is now technologically feasible and may help in changing the perception about the latest developments. Secondly, this will help researchers and doctors in developing future applications.

Benefits of Holography

This technology is rapidly growing in the medical field for its use in practical studies and explanation. The enormous potential of holography is to import and use high-capacity data. It stores information about multiple images at different angles.[1], [12] Different benefits of holography in the medical field are as under:

• Improve the way of procedure and treatment

• Provide advanced imaging

• Effective learning

• Useful for multiple images

• Capacity of storing

• Do not require any projection screen

• Save cost in processes

• Improve customer careIncrease the efficiency of doctors and surgeons

• 3D visualisation of products and situations

• Do not require special glasses to view

• Store preserve and archive information

Thus, holography provides advancements in education, planning, security, safety and research and development.

Holography for Radiologists

Holography is an advanced imaging technique that helps radiologists to identify injury or any other fracture in the soft or hard tissue of patients. It improves the safety and better treatment of the patients. With the help of this innovative imaging technique, all previous medical records of the patient can be stored digitally, by which a radiologist can easily examine the medical history of a patient. It has several applications in radiology like cardiovascular, chest, genitourinary, musculoskeletal, neuroradiology, paediatric and head and neck radiology. Holography has excellent capabilities for radiology towards using truly virtual 3D images. It provides a more information to radiologists as compared to 2D images and maintains a vast amount of information due to its electronic storage capability. This technology is useful in radiology for the planning of different surgical approaches by guiding invasive procedures.[2], [13] It stores and retrieves 3D information which was a big challenge for traditional imaging technologies.

Some Cases on Holography in the Medical Field

Aarnisalo et al., 2009 performed a case to assess the position and thickness of a cartilage by using holography.[5] Salvetti and Bertagni, 2016 used hologram to develop a medical test and devices used to monitor various conditions like infection, cardiac function and diabetes. This is used for advanced medical simulation and enables face-to-face training. It rapidly emerging in healthcare and makesthe education process more efficient and effective.[14] Pathania et al., 2016 used holography for the proper assessment of lymphoma tissue. This is an essential technology to identify the cancer accurately in lesser time.[12] Mishra, 2017 used holography for primitive designing in medical science. An organ hologram can be zoomed and edited in 3D space which makes the treatment and diagnosis processes more effective. In future, this technology can prevent uncomfortable physical procedures.[1]

Holography Applications in the Medical Field

Holography facilitates excellence in healthcare by sorting out complications in imaging. This technology can be useful to eliminate the requirements of physical testing procedure.[15], [16] It easily stores digital 3D images of the patient or body parts. It employs reliable and efficient management of all records, and with better devices and improved storage facility, it is easy to analyse the progress.[17], [18] Holograms are available for various medical test and devices and are used to monitor diabetes, infections and check the proper functioning of soft and hard tissues. This technology is available to check drug, hormones, alcohol and glucose.[19], [20]

Doctors can now use Colourful holography for proper monitoring and clinical trials and for studying complex images vascular, nervous and musculoskeletal systems. Now, doctors and surgeon can see the detailed images of soft and hard tissue of the human body. They can also see the human body from outside. Holography has the potential for a high level of achievement in medical research and development. [Table 1] gives significant applications of holography in the medical field.

Table 1

Major applications of holography in the medical field

Applications	Description	References
View of human skeletons	With the help of holography, doctors can see accurate human skeletons, organs, muscle, veins and vessels It helps the surgeon for proper training and planning of the operation Precisely shows complete skeleton with arteries plus nervous system and other aspects of the body Make effective representation of brain image and its intricate parts Helpful to improve the quality of treatment efficiently	Stockmar et al., 2013[21]; Zhang et al., 2017[22]; Yamada et al., 2018[23]; Wu et al., 2019[24]
Identification of abnormal growth	This technology enables to identify the abnormal growth of tissue, organs and even external body parts Researcher use holography to detect diseases and proper monitoring of health conditions like infections and hormone imbalance Helpful to researcher and doctors to eliminate the requirement of the physical testing procedure Useful technology for proper representation of the abnormal 3D structure and other unwanted growth/fats Used for the disease forecasting and identify advancement for the treatment procedure	Simpson et al., 2014[25]; Plascencia-Villa et al., 2016[26]; Rivenson et al., 2016[27]
Detect serious abnormalities	Used to detect a severe issue/abnormalities in tissues and organs in the human body The advancement of this technology is for various types of cells and Deoxyribonucleic Acid (DNA) Provide multidimensional information by performing simultaneous imaging about abnormalities Useful to carry out proper detection of disease, biomedical research & analysis and other related applications	Moon and Javidi, 2007[28]; Kjeldsen et al., 2015[29]; Ronzitti et al., 2017[30]
Inside map of the patient body	This technology allows the surgeon to see inside the patient body and facilitate the study of tissue structure and other damages/growth Heart surgeon use hologram to see the children heart which can be helpful during the operations Help Doctors carry dedicated procedures by employing a proper inside map with precision Holography images are beneficial during surgery and are useful in comparing it with the previously captured image Used to detect the blood loss during the surgery which can provide proper information to the surgeon Inside fracture in bone and tissue can be analysed before the actual operation	Nesters et al., 2008[31]; Dobrev et al., 2014[32]; Rong et al., 2015[33]
Outside mapping of patient body	Doctors can see the external parts and other related details of the patient body and facilitate disease detection and remote treatment This technology is suitable to deliver effective teaching for imparting better medical education Useful for detection of abnormality in body parts Can eliminate some necessary physical testing	Buzalewicz et al., 2016[34]; Tahara et al., 2018[35]; Nobukawa et al., 2019[36]
Presentation and simulation	In medical education, this technology is suitable to deliver an effective presentation to students It allows for a virtual lecture in real-time with the audience Provide live simulation for better learning of the procedure Proper presentation of the cardiovascular system and detect any heart defect at an early stage Projected 3D holography digital image to precisely analyse the function and blood flow in the cardiovascular system	Siegel et al., 2015[37]; Brudfors et al., 2017[38]; Bedrossian et al., 2017[39]
Emergency care	Provide better guidance during an emergency Helpful for proper treatment during accident situation with the help of previously-stored holography images Bring new dimensions in modern communication system during emergency care By using this technology, medical professionals can treat their patient remotely and in isolated areas In a rural area, it improves access to the specialised consultant, and a patient may not have to visit the doctor physically at a far off place	Rodrïguez et al., 2011[40]; Jo et al., 2017[41]; Krenkel et al., 2017[42]
Detailed heart information	For cardiologist, 3D holography image provides detailed information of patient heart as compared to 2D screen This modern visualisation technology provides a new opportunity to see the heart and its valves Holography is used for proper scanning of body, medical checkup and sees the defective heart It is a valuable tool which creates an immersive experience for crucial cardiac care and education Provides endless possibilities in the area of cardiovascular diseases	Song et al., 2016[43]; Bocanegra et al., 2016[44]; Merola et al., 2017[45]
Recording, storage and retrieval of dental data	In dentistry, useful to store the record of tooth prints and other dentistry models It checks the progress of the patient by storing all data digitally Provides nondestructive possibilities to see the gap and measurement of soft tissue with teeth Easily stored data of patient teeth digital and successfully carried out the study on these digital models in future Original tooth prints are easily stored which can be used to check the accuracy of treatment Ability to understand the complexity of treatment in the real world	Furlong et al., 2013[46]; Merrill et al., 2015[47]; Haleem and Javaid, 2019[48]
Detailed colourful information of the body and its organs	Holography is used to provide precise information as a real visual field Researchers used this technology to view detailed and realistic colour organs Reconstruct bright 3D image in natural colour which quickly provides solution of a given problem Used to make high resolution colourful digital medical model (recordkeeping) It is an important tool for human visual perception Researcher use this technology to produce digital 3D images of museum displays and advertisement and animation	Aarnisalo et al., 2010[49]; Bishara et al., 2011[50]; De Angelis et al., 2019[51]
Breathe testing	Holography used to create smart health by smartly indicating patient breathing problem Useful for proper testing and monitoring of health and other medical conditions Used to check environmental conditions to indicate, water quality and food to make effective health Also applied to monitor glucose level and proper analysis of human breathing	Galeotti et al., 2010[52]; Makey et al., 2019[53]; Javaid and Haleem, 2019[54]
Evaluating patient progress	Doctors can now check the progress of the patient and can plan better planning for the treatment Provide appropriate information about swelling during the injury of the patient Used for successful treatment of many diseases by continuously check the progress Doctors and surgeon not only see the medical image directly but also can rotate and slice Better coordination between all health professionals without any risk of failure	Rosen et al., 2006[55]; Flores-Moreno et al., 2011[56]; Haleem et al., 2019[1]
Measurement of body parts and structure	Holography is used for the precise measurement of human body structure The best technique which enables to measure rough surface with high precision Useful to determine the shape, size, length, diameter and orientation of the medical part Used for inspection and testing of implants to maintain the quality Proper measurement of the heart valve and another microfluidic channel Detection of errors during the manufacturing of medical tools and devices Also applicable to the measurement of toys and museum object	Cheng et al., 2009[57]; Khaleghi et al., 2013[58]; Sobieranski et al., 2015[59]; Shevkunov et al., 2019[60]; Haleem et al., 2020[61]
Identify complex fractures	Holography is precisely to identify and explain the complex fracture in human soft and hard tissue It analyses the fracture during the peak load of the human body and its process of causes Helps to detect the problems in the ongoing situation of the complex disease This technology is helpful to perform complex surgery precisely and betterment of meditational lesions	Cantu-Valle et al., 2014[62]; Sapozhnikov et al., 2015[19]; Tahara et al., 2018[35]; Haleem et al., 2019[63]
Medical educations	This technology is important in medical colleges for the design and development of artificial bones, joints and prosthetic limbs The applications of this technology facilitate the research and development in the medical field The best tool for the teaching and learning of the medical student in the real world Students can precisely learn about the cause of diseases and their effects In future, it will successfully be used in medical education, teaching, learning and biomedical research	Ozsoy-Keskinbora et al., 2014[64]; Nobukawa et al., 2019[36]

By using a holographic image, doctors can improve the quality of medical education and research. It used to reconstruct the image of tissue samples which helps to perform tissue surgeries. This technology is used for making the digital 3D prototype for neuroscience. This also offers help in the study of different orthopaedics structure. It is applicable to measure the strain on rods, pins and different bone fracture. Doctors can now see the anatomy of the patient without cutting into the body.[14], [65] It is useful to create technological advancement in the medical field.

Discussion

In the healthcare industry, the demand for medical holography is increasing for new treatment. The massive ability of this technology is to record and read data. Doctors and surgeon can enhance their communication with the patient to address the complex medical problem. It creates moving 3D images of body parts to create advancement in the imaging field. It helps doctors for proper diagnosis and treatment in a secure and timely manner. The applications of this technology are for medical imaging, urology, orthopaedics and medical institutions for research and development process. Medical images are visualised to create a hyper-realistic experience to empower the clinician. It helps measurements of internal cavities of the human body non-destructively. In dentistry, it is used to store tooth prints digitally. It quickly tests breath, saliva, blood and urine and provides a better understanding as compared to books/images. This technology provides a virtual environment, which helps to solve a complex issue.

However, it needs a large amount of storage space for better treatment of disease and injury. In orthopaedics, holography is an emerging tool to study and measure the external fracture of the bone. It allows seeing the structure of bone and their movement in real-time. These images help doctors for the treatment without the presence of the patient. Holography completely disrupts the way of communication of medical professionals. It avoids misunderstanding of a specific medical problem ensuring a better treatment. This digital holography is used to perform effective diagnosis and provide more clarity and patient satisfaction.

Limitations and Future Scope

It requires highly skilled human resources for capturing the 3D image. Most of the people are unfamiliar with this technology. Expensive hardware and software are required to produce and view the medical images. Holography imaging is costly as compared to 2D imaging. This technology is not successful during complex movements. The images captured by this technology are time-consuming and need specialised hardware and software. Export of datasets to create a hologram is a big concern.

In future, holography will provide ‘Holodoctors’ in the medical industry. It is possible that a doctor in a remote location can see the holography image and provide treatment. It will also be helpful for the manufacturing of pharmaceutical and healthcare products. In future, holography will provide an innovative solution for the development of healthcare. These 3D holographic images will also be helpful for business purposes. There is a need for medical persons to develop better applications of holography in their respective areas.

Conclusion

Holography has emerged as an innovative technology to record and display information in 3D format. The applications of this technology are in different fields of medical, engineering, science, graphics and arts. It plays a vital role in personalised medicine and healthcare facilitation. Holography image lowers the cost of planning and provides better outcomes for the patient. This technology is helpful for remote places in which the hologram of a patient is sent to the doctors by emails which can be examine for the status of the diseases without the physical presence of the patient. It is used for better planning of interventional procedures of structural heart diseases. A physician can manipulate a 3D heart structure in a holographic image. Thus, it can be used for better understanding of a patient’s heart during the procedure.

Holography has good applications in ophthalmology, audiology, orthopaedics and dentistry. In medical science, holography is growing faster towards improving the understanding and better communications by which doctors can see the detailed structure of the patient. It provides a better understanding of multiple organs, anatomical structures and blood vessels. This technology is useful to develop 3D hologram of various cells, organs and tissue, which can further be studied from various angles. It is helpful to research and study the effects of various drugs on the individual patient. It improves the understanding of the complex anatomy of the individual patient and can also provide better information regarding chronic kidney disease. This technology seems to be a better teaching tool as compared to other conventional imaging tools.

Conflict of Interest

There are no conflicts of interest.

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Publication History

Received: 29 January 2020

Accepted: 13 May 2020

Article published online:
19 July 2021