To iMAR or not to iMAR: Quantitative impact of MAR algorithms on image quality in a phantom study.

Introduction: The purpose of this study was to describe the impact of the latest metal artefact reduction algorithm (MAR) on a photon-counting CT (PCCT) in a phantom study simulating metal hip prostheses.

Methods: Two phantoms were scanned on a clinical PCCT with different configurations of laterally placed metal inserts. Acquisitions were performed at 140 kVp and reconstructed as virtual monoenergetic images (VMI) at 60-190 keV in 10-keV steps using a standard abdominal kernel, with and without iterative MAR (iMAR).

3D-navigation for SI screw fixation - How does it affect radiation exposure for patients and medical personnel?

Background: 3D-navigation for percutaneous sacroiliac (SI) screw fixation is becoming increasingly common and several studies report great advantages of this technology. However, there is still limited clinical evidence on the efficacy regarding radiation exposure for patient and personnel.

Methods: This is a retrospective, single-center cohort study.

Fully automated breast segmentation on spiral breast computed tomography images.

Introduction: The quantification of the amount of the glandular tissue and breast density is important to assess breast cancer risk. Novel photon-counting breast computed tomography (CT) technology has the potential to quantify them. For accurate analysis, a dedicated method to segment the breast components-the adipose and glandular tissue, skin, pectoralis muscle, skinfold section, rib, and implant-is required.

Efficiency evaluation of leaded glasses and visors for eye lens dose reduction during fluoroscopy guided interventional procedures.

Purpose: Fluoroscopy guided interventional procedures guarantee high benefits for patients, but are associated with high levels of radiation exposure for the medical staff. Their increasing use and complexity results in even higher radiation exposures, with a risk to exceed the annual dose limit of 20 mSv for the eye lens. The aim of the study was to evaluate the potential dose reduction of eye lens exposure for lead glasses and for two types of visors (half and full), used by physicians performing interventional procedures.