Performance characteristics of a new pixelated portable gamma camera

Abstract

Herein, the authors describe detailed performance evaluation procedures of a new pixelated portable gamma camera system, which can also be applied to evaluate other pixelated gamma camera system. Spatial resolution assessment in near-field imaging condition offers a unique challenge where the measured FWHM is highly dependent on relative position between the capillary tube and the detector element. The evaluations of the Ergo gamma camera suggest suitable clinical imaging performance. This portable gamma camera has a high (LEAP) planar sensitivity, high energy and spatial resolutions that are comparable to other available gamma cameras, and it exhibits superior count rate performance that is linear up to tens of millions count per second. The Ergo imaging performance, however, can still be improved, for example, by optimizing collimator design for near field imaging.

Intraoperative Use of a Portable Large Field of View Gamma Camera and Handheld Gamma Detection Probe for Radioguided Localization and Prediction of Complete Surgical Resection of Gastrinoma: Proof of Concept

“…Quality readable imaging can be obtained within 5 minutes of the start time of image acquisition for the patient scans and 1 minute for the specimen scans, which is easily viewable to the surgeon on a laptop workstation, providing immediate real-time navigational feedback using the portable LFOVGC. 40 Despite preoperative efforts to localize gastrinomas with 111 In-pentetreotide imaging, intraoperative localization remains a challenging feat, as gastrinomas are frequently small and difficult to palpate. Additionally, primary lesions are generally located in and around vital structures, making wide surgical dissection tedious and not without risk of significant complications.…”

Collimator for Variable Sensitivity and Spatial Resolution Without the Need for Exchange

“…However, these spaces are small enough that the results of the simulations are not expected to differ much from the actual conditions. In the present study, multiple rectangular apertures were used because pixel-based gamma cameras have emerged for imaging [16][17][18][19]. With this type of camera, pixel matching to the collimator holes can be achieved using a collimator with multiple rectangular apertures.…”

A Multimodality Hybrid Gamma-Optical Camera for Intraoperative Imaging

“…Many research groups around the world have been developing a range of hand-held or portable systems for medical gamma imaging [1,2,3,4,5,6,7,8,9,10,11,12]. To date, these smaller systems have all concentrated on a single imaging modality.…”