Evaluation of a CdTe semiconductor based compact gamma camera for sentinel lymph node imaging

Abstract

The laboratory performance of this imaging probe is limited by the pinhole collimator performance and the necessity of working in minification due to the limited detector size. However, in clinical operative conditions, the CdTe imaging probe was effective in detecting SLNs with adequate resolution and an acceptable sensitivity. Sensitivity is expected to improve with the future availability of a larger CdTe detector permitting operation at shorter distances from the patient skin.

CdTe compact gamma camera for coded aperture imaging in radioguided surgery

“…The aim of this work was to assess the laboratory performance of a prototype compact gamma camera (MediPROBE) based on a highspatial resolution semiconductor CdTe hybrid pixel detector, coupled with a CA mask. In a previous report we showed the performance of MediPROBE equipped only with pinhole collimators [18], and a MediPROBE without the lead shield, showing the housing for the interchangeable tungsten collimators and the chipboard with the CdTe hybrid pixel detector and the dedicated USB readout interface. In d) is shown a photo of the detector chipboard.…”

“…Single aperture collimators (e.g. pinhole) offer a geometric efficiency rapidly falling off at increasing longitudinal distances, and are not commonly adopted in such compact imaging probes; yet, they can enable a high spatial resolution since the image can be projected with magnification on the detector plane, or even in minification when a high resolution detector is available [18].…”

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.…”

Evaluation of XRI-UNO CdTe detector for nuclear medical imaging

“…The preferred radiopharmaceutical for this procedure is 99m Tc labelled nanocolloid. During the operation a gamma probe is used for measuring the radioactive uptake in SLNs, however the introduction of imaging probes based on semiconductor detectors has been developed [5].…”

“…-1 -Examples of CdTe semiconductor detection for X-ray and gamma-ray imaging indicate that the newly developed semiconductor detectors have the potential to be competitive with the existing imaging devices based on scintillators [4,5].…”