Hysterosalpingography using a flat panel unit: Evaluation and optimization of ovarian radiation dose

Abstract

Digital spot radiographs could be omitted in modern flat panel systems during HSG. Fluoroscopy image acquisitions in a modern flat panel unit at 3.75 pps and a beam filtration of 4 mm Al and 0.9 mm Cu demonstrate acceptable image quality with an average D equal to 0.45 mGy. This value is lower compared to the studied literature. For these reasons, the proposed method may be recommended for routine HSG examination in order to limit radiation exposure to the ovaries.

Patient dose in endoscopic retrograde cholangiopancreatography (ERCP)

“…The parameters used for the objective evaluation of the IQ were SNR (Vano et al, 2005 and HCSR (Messaris et al, 2012), according to the following equations:…”

Evaluation of patient dose during fluoroscopically guided cervical spinal fusion

“…and high contrast spatial resolution (HCSR) are the most common physical quantities considered by the most of the authors [124][125][126][127][128][129][130][131][132][133][134][135][136][137]. These are directly related to operator selectable parameters (fluoroscopy mode, field of view (FOV), geometric magnification, exposure factors, focus skin distance and collimation).…”

“…In general, such phantoms are used for dose and quantitative image quality assessment, as well as for performance testing of the fluoroscopic equipment . The characterization of the overall performance of a fluoroscopy system can be described by estimating a FOM, which combines image and dose indices during implementation of different operating modes [129][130][131][132][133][134][135][136][137]. However, only a few experimental data are available, considering the radiation dose and image quality indices during intraoperative fluoroscopy in spinal surgery [69,106].…”

“…The characterization of the performance of a fluoroscopy system in terms of dose and image quality is an important step towards the optimization process. Experimental studies using test objects and PMMA slabs to simulate patients of different sizes may provide useful data regarding the patient's ESD and the corresponding image quality [131,133,135,137].…”

“…The overall performance can be described by estimating a FOM, which combines image and dose indices during the implementation of different acquisition protocols, fluoroscopy modes, exposure factors and magnification FOVs [131,133,135,137]. This information may help the neurosurgeons to select the optimal settings of their systems, in order to minimize patient dose during the procedures with respect to their body size [151,477], clinical conditions [476] and their personal preferences.…”