UNLABELLED Heart to mediastinum count ratio (H/M) has been commonly utilized as an indicator of myocardial I-123 MIBG uptake. However, normal ranges of H/M were markedly different among various gamma camera systems. The purpose of this study was to clarify whether scatter correction by two-window method standardizes H/M among various gamma camera systems. METHODS Scatter uncorrected and corre...

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Imaging distributions of radioactive sources plays a substantial role in nuclear medicine as well monitoring waste and its deposit. Coded Aperture has been proposed an alternative to parallel or pinhole collimators, but requires image reconstruction extra step. Multiple methods with varying run time computational complexity have proposed. Yet, no quantitative comparison between the different ca...

In pixelated CdZnTe detectors, multiple interaction gamma-ray events are critical because they permit Compton imaging. However, in large-volume CdZnTe crystals, the depth of multiple interaction events is often poorly reconstructed due to significant nonuniformity of electron drift velocity while the depth of single interaction events can be accurately reconstructed using signal ratios. The non...

The visualization of drugs is essential for cancer treatment. Although several methods visualizing have been proposed, a versatile method that can be easily applied to various has not yet established. Therefore, we propose “activation imaging,” in which drug irradiated with thermal neutrons and becomes radioactive, enabling using emitted x rays and/or gamma rays. Activation imaging does require...

As MRI threatens the use of bone scintigraphy for skeletal metastases and 18F-fluorodeoxyglucose positron emission tomography (18FDG-PET) emerges as the main focus in nuclear oncology, the future role of the gamma camera in cancer imaging appears unclear. However, there is a range of pre-existing conventional gamma camera techniques that have incremental benefit over CT and other structural ima...

UNLABELLED Localization of sentinel lymph nodes can be challenging if they are in difficult anatomic locations or near high radiotracer activity. The purpose of this study was to assess the value of intraoperative real-time imaging using a portable gamma-camera in conjunction with a conventional gamma-counting probe when it is difficult to localize the sentinel node. METHODS After (99m)Tc-nan...