Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Patient Dose Estimation in Computed Tomography Guided Biopsy Procedures

Version 1 : Received: 20 October 2023 / Approved: 21 October 2023 / Online: 21 October 2023 (17:40:38 CEST)

A peer-reviewed article of this Preprint also exists.

Siomou, E.; Filippiadis, D.K.; Efstathopoulos, E.P.; Antonakos, I.; Panayiotakis, G.S. Patient Dose Estimation in Computed Tomography-Guided Biopsy Procedures. J. Imaging 2023, 9, 267. Siomou, E.; Filippiadis, D.K.; Efstathopoulos, E.P.; Antonakos, I.; Panayiotakis, G.S. Patient Dose Estimation in Computed Tomography-Guided Biopsy Procedures. J. Imaging 2023, 9, 267.

Abstract

ABSTRACT Objectives: Typical Diagnostic Reference Levels (DRL) in terms of Computed Tomography Dose Index (CTDI) and patient dose in terms of Effective Dose (ED ) and Size Specific Dose Estimate (SSDE) were estimated in Computed Tomography (CT) guided biopsy procedures. Materials and Methods: A total of 226 CT biopsy procedures - Iliac bone, liver, lung, mediastinum and para-aortic tissue - were retrospectively analyzed and Typical DRL extracted based on ICRP 135 instructions. Results: For helical mode acquisitions, DRLs in terms of CTDIvol were 9.7 mGy for Iliac bone, 8.9 mGy for liver, 8.8 mGy for lung, 7.9 mGy for mediastinal mass and 9 mGy for para-aortic lymph nodes biopsy procedures. For biopsy acquisitions, DRL values were 7.3 mGy, 7.7 mGy, 5.6 mGy, 5.6 mGy and 7.4 mGy respectively. Also, SSDE median values ranged from 7.6 mGy to 10 mGy for biopsy acquisitions and 11,3 mGy to 12,6 mGy for helical acquisitions, as well as the median values for effective dose ranged from 1.6 mSv to 5,7 mSv for biopsy scans and 3.9 to 9.3 mSv for helical scans. Conclusions: The use of DLR as an optimization tool for CT-guided biopsy procedures revealed that helical scans across the entire anatomical region greatly affect radiation dose compared to biopsy acquisitions.

Keywords

patient dose; CT guided biopsy procedures; Diagnostic Reference Levels

Subject

Physical Sciences, Radiation and Radiography

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