NDLI: Radiation dose during CT scan with PET/CT clinical protocols

Content Provider	IEEE Xplore Digital Library
Author	Hye-Kyung Son Sang Hoon Lee Sora Nam Hee-Joung Kim
Copyright Year	2006
Description	Author affiliation: Res. Inst. of Radiol. Sci., Yonsei Univ., Seoul (Hye-Kyung Son)
Abstract	The purpose of this study was to evaluate the radiation doses during CT scans by changing tube voltage and tube current, and to estimate the radiation dose for our clinical protocols during transmission measurement in PET/CT scans. Radiation doses were evaluated for Philips GEMINI 16 slices PET/CT and GE DSTe 8 slices PET/CT systems. A CTDI was measured with standard head and body CT dosimetry phantoms in a variety of CT tube voltage and tube current. A pencil ionization chamber with an active length of 100 mm, and electrometer were used for the CTDI measurement. The measurement is carried out at the free-in-air, center and periphery. The average dose was calculated by the weighted CTDI $(CTDI_{w}$ = $1/3CTDI_{100,c}$ + $2/3CTDI_{100,p}).$ Specific organ doses were measured with our clinical protocols for transmission measurement with the Philips PET/CT system and GE PET/CT system with TLDs and anthropomorphic phantom. The TLDs used for measurements were selected for an accuracy of plusmn5% and calibrated in an X-ray radiation field. The organ or tissue was selected by the recommendations of ICRP 60. The radiation dose measured by using standard CTDI phantoms during a CT scan is affected by the tube voltage and the tube current. The measured effective doses with transmission measurements for the Philips system were ranged from 0.14 mSv to 55.54 mSv. The measured effective doses with transmission measurements for GE system were ranged from 0.27 mSv to 24.83 mSv. Radiation dose for clinical protocols during transmission measurements in the PET/CT system can be measured using CTDI phantom with ionization chamber and anthropomorphic phantom with TLDs. Further studies need to be performed to find optimal CT acquisition protocols for reducing the patient exposure with same image quality.
Starting Page	2210
Ending Page	2214
File Size	234272
Page Count	5
File Format	PDF
ISBN	1424405602
ISSN	10957863
DOI	10.1109/NSSMIC.2006.354353
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computed tomography Positron emission tomography Protocols Imaging phantoms Voltage Current measurement Measurement standards Ionization chambers Anthropomorphism Head
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
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8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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