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- Title
PATIENTS DOSE ESTIMATION IN CT EXAMINATIONS USING SIZE SPECIFIC DOSE ESTIMATES.
- Authors
Choudhary, Neha; Rana, Bhupendra Singh; Shukla, Arvind; Oinam, Arun Singh; Singh, Narinder Paul; Kumar, Sanjeev
- Abstract
The present work reports data of radiation exposure to the patients during head, chest, pelvis and abdomen CT examinations performed on a third-generation 16-slice CT machine. Radiation exposure was estimated using size specific dose estimates (SSDE) method, which takes into account patient's physical dimensions in phantom measured computed tomography dose index (CTDI) value. The reported median CT dose volume index CTDI vol values in head, chest, pelvis and abdomen examinations were 26.76, 16.27, 29.81 and 14.74 mGy, respectively. The median doses evaluated using SSDE methodology for the above mentioned procedure were 54.1, 23.1, 42.8 and 20.1 mGy, respectively. Our results showed variation in dose values estimated using CTDI and SSDE methods in all examinations. The evaluated SSDE values were also compared to the values derived from data reported by the American Association of Physicist in Medicine (AAPM). SSDE values in present measurements are 4–8% lower than AAPM values. The present results show that CTDI parameters recorded on CT console should not be used to specify patient dose during CT procedures.
- Subjects
DIMENSIONS; CONE beam computed tomography; RADIATION exposure; PELVIC examination; COMPUTED tomography
- Publication
Radiation Protection Dosimetry, 2019, Vol 184, Issue 2, p256
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncy207