To determine accurate organ doses, effective doses, and image quality of computed tomography (CT) compared with cone beam CT (CBCT) for correct identification of prostatic arteries.
A dual-energy CT scanner and a flat-panel angiography system were used. Dose measurements (gallbladder (g), intestine (i), bladder (b), prostate (p), testes (t), active bone marrow of pelvis (bmp) and femura (bmf)) were performed using an anthropomorphic phantom with 65 thermoluminescent dosimeters in the pelvis and abdomen region. For the calculation of the contrast-to-noise ratio (CNR) of the pelvic arteries, a patient whose weight and height were almost identical to those of the phantom was selected for each examination type.
The effective dose of CT was 2.7 mSv and that of CBCT was 21.8 mSv. Phantom organ doses were lower for CT than for CBCT in all organs except the testes (g: 1.2 mGy vs. 3.3 mGy, i: 5.8 mGy vs. 23.9 mGy, b: 6.9 mGy vs. 19.4 mGy, p: 6.4 mGy vs. 13.2 mGy, t: 4.7 mGy vs. 2.4 mGy, bmp: 5.1 mGy vs. 18.2 mGy, bmf: 3.3 mGy vs. 6.6 mGy). For human pelvic arteries, the CNR of CT was better than that of CBCT, with the exception of one prostate artery that showed stenosis on CT. Evaluation by experienced radiologists also confirmed the better detectability of prostate arteries on CT examination.
In our study preprocedural CT had lower organ doses and better image quality comparedd with CBCT and should be considered for the correct identification of prostatic arteries.
European journal of radiology. 2024 Jan 23 [Epub ahead of print]
Beatrice Steiniger, Martin Fiebich, Marc-Oliver Grimm, Amer Malouhi, Jürgen R Reichenbach, Marcel Scheithauer, Ulf Teichgräber, Tobias Franiel
Department of Diagnostic and Interventional Radiology, University Hospital, Am Klinikum 1, 07747 Jena, Germany. Electronic address: ., Department LSE, Technische Hochschule Mittelhessen, Wiesenstraße 14, 35390 Gießen, Germany., Clinic for Urology, University Hospital, Am Klinikum 1, 07747 Jena, Germany., Department of Diagnostic and Interventional Radiology, University Hospital, Am Klinikum 1, 07747 Jena, Germany., Medical Physics Group, Department of Diagnostic and Interventional Radiology, University Hospital, Am Klinikum 1, 07747 Jena, Germany., Stabsstelle Strahlenschutz, University Hospital, Am Klinikum 1, 07747 Jena, Germany.