AIM: To determine the relationship of body mass index (BMI) on the mean dose length product (DLP) values acquired using modulated (automatic exposure control) and standard computed tomography (CT) scanning protocols as part of a typical 18F-FDG PET/CT study. METHODS: A retrospective study was performed and the dose-length product and BMI values from routine 18F-FDG PET/CT scans of 51 patients were recorded. The scans were performed on a 16-slice PET/CT scanner by using an automatic exposure control (AEC) system. DLP, BMI, age, sex and number of bed positions were documented for each patient. RESULTS: Twenty-four women and 27 men were included in the study (mean age, 52.5 years). The mean BMI was 24.76 kg/m2. The mean modulated DLP was 528.25 mGy/cm. Patients were grouped according to BMI (normal: BMI <25, overweight: BMI 25 – 30, obese: BMI >30) and age (≤18 years, 19 – 59 years, ≥ 60 years). The mean modulated DLP decreased by 22.77% for patients in the normal BMI group (P < 0.001). The obese group of patient’s mean modulated DLP was 26.29% higher (P < 0.01). The DLP decreased by 22.43% for patients aged 60 years and above compared with patients in the 19 – 59 age group. CONCLUSION: The use of modulated scanning protocol significantly reduces the integrated dose received from a whole body CT scan for patients with a BMI < 25. Increasing patient size (BMI >25) significantly increases the integrated dose received. The possible change in body composition with age may also indicate a reduction in dose received from a whole body CT scan using AEC.
| Published in | International Journal of Medical Imaging (Volume 3, Issue 5) |
| DOI | 10.11648/j.ijmi.20150305.12 |
| Page(s) | 94-97 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2015. Published by Science Publishing Group |
Dose-Length Product, Body Mass Index, Automatic Exposure Control
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APA Style
Simon Atkins. (2015). The Relationship of CT Mean Modulated Dose-Length Product and Body Mass Index During Routine 18F- FDG PET/CT Studies. International Journal of Medical Imaging, 3(5), 94-97. https://doi.org/10.11648/j.ijmi.20150305.12
ACS Style
Simon Atkins. The Relationship of CT Mean Modulated Dose-Length Product and Body Mass Index During Routine 18F- FDG PET/CT Studies. Int. J. Med. Imaging 2015, 3(5), 94-97. doi: 10.11648/j.ijmi.20150305.12
AMA Style
Simon Atkins. The Relationship of CT Mean Modulated Dose-Length Product and Body Mass Index During Routine 18F- FDG PET/CT Studies. Int J Med Imaging. 2015;3(5):94-97. doi: 10.11648/j.ijmi.20150305.12
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Download@article{10.11648/j.ijmi.20150305.12,
author = {Simon Atkins},
title = {The Relationship of CT Mean Modulated Dose-Length Product and Body Mass Index During Routine 18F- FDG PET/CT Studies},
journal = {International Journal of Medical Imaging},
volume = {3},
number = {5},
pages = {94-97},
doi = {10.11648/j.ijmi.20150305.12},
url = {https://doi.org/10.11648/j.ijmi.20150305.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmi.20150305.12},
abstract = {AIM: To determine the relationship of body mass index (BMI) on the mean dose length product (DLP) values acquired using modulated (automatic exposure control) and standard computed tomography (CT) scanning protocols as part of a typical 18F-FDG PET/CT study. METHODS: A retrospective study was performed and the dose-length product and BMI values from routine 18F-FDG PET/CT scans of 51 patients were recorded. The scans were performed on a 16-slice PET/CT scanner by using an automatic exposure control (AEC) system. DLP, BMI, age, sex and number of bed positions were documented for each patient. RESULTS: Twenty-four women and 27 men were included in the study (mean age, 52.5 years). The mean BMI was 24.76 kg/m2. The mean modulated DLP was 528.25 mGy/cm. Patients were grouped according to BMI (normal: BMI 30) and age (≤18 years, 19 – 59 years, ≥ 60 years). The mean modulated DLP decreased by 22.77% for patients in the normal BMI group (P 25) significantly increases the integrated dose received. The possible change in body composition with age may also indicate a reduction in dose received from a whole body CT scan using AEC.},
year = {2015}
}
TY - JOUR T1 - The Relationship of CT Mean Modulated Dose-Length Product and Body Mass Index During Routine 18F- FDG PET/CT Studies AU - Simon Atkins Y1 - 2015/08/07 PY - 2015 N1 - https://doi.org/10.11648/j.ijmi.20150305.12 DO - 10.11648/j.ijmi.20150305.12 T2 - International Journal of Medical Imaging JF - International Journal of Medical Imaging JO - International Journal of Medical Imaging SP - 94 EP - 97 PB - Science Publishing Group SN - 2330-832X UR - https://doi.org/10.11648/j.ijmi.20150305.12 AB - AIM: To determine the relationship of body mass index (BMI) on the mean dose length product (DLP) values acquired using modulated (automatic exposure control) and standard computed tomography (CT) scanning protocols as part of a typical 18F-FDG PET/CT study. METHODS: A retrospective study was performed and the dose-length product and BMI values from routine 18F-FDG PET/CT scans of 51 patients were recorded. The scans were performed on a 16-slice PET/CT scanner by using an automatic exposure control (AEC) system. DLP, BMI, age, sex and number of bed positions were documented for each patient. RESULTS: Twenty-four women and 27 men were included in the study (mean age, 52.5 years). The mean BMI was 24.76 kg/m2. The mean modulated DLP was 528.25 mGy/cm. Patients were grouped according to BMI (normal: BMI 30) and age (≤18 years, 19 – 59 years, ≥ 60 years). The mean modulated DLP decreased by 22.77% for patients in the normal BMI group (P 25) significantly increases the integrated dose received. The possible change in body composition with age may also indicate a reduction in dose received from a whole body CT scan using AEC. VL - 3 IS - 5 ER -
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