John T. Hood

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We designed and built a positron emission transverse tomograph (PETT VI), designed specifically for fast dynamic studies in the human brain, and for cardiac studies in experimental animals. The scintillation detectors incorporated into this device are fitted with cesium fluoride crystals. Cesium fluoride was selected for this purpose because its short(More)
Imaging of the brain by positron emission tomography can be optimized for sensitivity by dedicating the design of the tomograph to this application. We have designed a multislice positron emission tomograph (PETT V) for imaging the human brain and the whole body of small experimental animals. The detector system of PETT V consists of a circular array of 48(More)
We designed, built, and tested a positron emission tomograph (PETT IV) capable of providing seven slices of the human body simultaneously. PETT IV utilizes a moving hexagonal array of 48 scintillation detectors placed around the subject. Each detector consists of a cylindrical activated sodium iodide crystal optically coupled to two photomultiplier tubes.(More)
The operation of PETT IV, a positron emission transverse tomograph capable of multislice imaging, relies on an electronic design which was developed for that system. The functions performed by this system include operation of the scintillation detectors, ¿-ray positioning circuitry, data collection logic, and computer interfacing. Design considerations and(More)
The physical characteristics and some imaging capabilities of Super PETT I, a positron emission tomograph utilizing time-of-flight (TOF) in its image reconstruction process were assessed experimentally by means of measurements carried out in phantoms and clinical imaging studies. The performance characteristics assessed included sensitivity, spatial(More)
PETT VI is a circular ring, multislice positron emission tomograph designed for small field studies. Features such as wobble and rotate motions, bimodal resolution, cesium flouride scintillators, fast timing circuits and dual buffer histogram memories allow a flexible data acquisition environment. Efficient modularized software concepts are implemented to(More)
PETT V1 is a high sensitivity, multislice positron emission tomograph designed for the imaging of the human brain. The design concepts incorporated in PETT V such as maximum circumferential detection efficiency, flexible linear and angular sampling, high and low resolution, and minimum data acquisition times of 1 second, enable it to be used in low(More)
UNLABELLED It has been long recognized that the primary advantage of imaging the brain with a positron emission tomography using GSO scintillation detectors placed on a spheroid surface is the large solid angle of acceptance for annihilation radiation, which results in improved system sensitivity and image signal-to-noise ratio. In the present study, we(More)
A simple low-volume (3 mL) target has been constructed for the production of 18F via the proton irradiation of 18O enriched water. The target is constructed of copper with the water cavity electroplated with nickel. This target routinely produces more than a curie of 18F (as [18F]fluoride) suitable for radiopharmaceutical syntheses.