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- Title
A SIMPLIFIED METHOD FOR THE WATER-EQUIVALENT DIAMETER CALCULATION TO ESTIMATE PATIENT DOSE IN CT EXAMINATIONS.
- Authors
Anam, Choirul; Arif, Idam; Haryanto, Freddy; Widita, Rena; Lestari, Fauzia P; Adi, Kusworo; Dougherty, Geoff
- Abstract
We proposed and evaluated a water-equivalent diameter calculation without using a region of interest (ROI), (D w,t ) and compared it with the results of using a ROI fitted to the patient border (D w,f ). Evaluations were carried out on thoracic and head CT images. We found that the difference between D w,t and D w,f was within 5% for all images in the head region, and most images were within 5% (27 of the 30 patients, 90%) in the thoracic region. We also proposed a method to automatically detect and eliminate the patient table (or head support) from images and evaluated the water-equivalent diameter values after the table had been removed (D w ,nt). This method was able to recognize and remove the patient table from all images used. By removing the table, the water-equivalent diameter (D w ,nt) became more accurate and the difference from D w,f was within 5% for all images (head and thoracic images).
- Subjects
DIAMETER; NUCLEAR medicine; EXAMINATIONS; RADIONUCLIDE imaging
- Publication
Radiation Protection Dosimetry, 2019, Vol 185, Issue 1, p34
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncy214