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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2017; 27(04): 389-396
DOI: 10.4103/ijri.IJRI_44_17
Thoracic/ Cardiac

Appraisal of radiation dose with 64-slice computed tomography perfusion in lung cancer patients with special reference to SSDE: An initial experience in a tertiary care hospital

Shuchi Bhatt
Department of Radio-diagnosis, University College of Medical Sciences and Guru Teg Bahadur Hospital, New Delhi, India
,
Ajai K Srivastava
Department of Radio-diagnosis, University College of Medical Sciences and Guru Teg Bahadur Hospital, New Delhi, India
,
Neha Meena
Department of Radio-diagnosis, University College of Medical Sciences and Guru Teg Bahadur Hospital, New Delhi, India
,
Shweta Thakur
Department of Radio-diagnosis, Post Graduate Institute of Medical Education and Research, Chandigarh, India
› Author Affiliations Financial support and sponsorship Nil.
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Abstract

Context: Computed tomography perfusion (CTP) is an important functional tool for lung cancer. It is expected to deliver high radiation dose, making its accurate estimation important. Size-specific dose estimate (SSDE) is a new dose metric, which includes the scanner output as well as the patient size. Aims: To determine radiation dose [CT dose index (CTDIvol), dose length product (DLP), effective dose (ED), and SSDE] for CTP in lung cancer and the correlation of CTDIvol, DLP, and SSDE with effective diameter and SSDE with weight, body mass index (BMI), and the scan length. Settings and Design: Cross-sectional study in the Department of Radio-diagnosis from October 2015 to March 2016. Patients and Methods: Due ethical approval and informed consent was taken. Thirty consecutive adult patients of lung cancer undergoing CTP study were included; various radiation dose parameters were determined and presented as mean ± SD. Statistical Analysis Used: Paired Student's t-test and Pearson correlation using Statistical Package for the Social Sciences, Version 16. Results: Mean radiation dose was CTDIvol = 270.138 ± 1.627 mGy, DLP = 681 ± 53.496 mGy.cm, ED = 12.501 ± 0.923 mSv, SSDE = 388.90 ± 81.27 mGy. The CTDIvol and DLP had significant positive correlation (r = 0.556, P= 0.000 and r = 0.522, P= 0.003, respectively) with effective diameter. SSDE had strong negative correlation (r = −0.997, P= 0.000) with effective diameter, significant negative correlation with the BMI (r = −0.889; P= 0.000) and weight (r= −0.910, P= 0.000) of patients. Scan length was not significantly correlated in SSDE (r = −0.012, P= 0.951). Conclusions: Smaller sized patients had greater SSDE.

Keywords

Lung cancer - multidetector computed tomography - patient safety - perfusion imaging - radiometry


Publication History

Article published online:
27 July 2021

© 2017. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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