Alan P. Jeavons

Learn More
Cognitive accounts of panic predict that panic disorder patients will be particularly prone to misinterpret autonomic sensations. Several studies have produced results consistent with this prediction, but each is open to alternative interpretation. To clarify matters, 2 studies administered the Body Sensations Interpretation Questionnaire (BSIQ) to panic(More)
A large sample of non-clinical subjects were screened and those who reported experiencing relatively frequent intrusive thoughts with associated neutralizing were selected. These subjects were randomly allocated to one of two conditions: both groups listened to repeated recorded presentations of one of their intrusive thoughts and were then required either(More)
A high-density avalanche chamber (HIDAC) positron camera was used for tomographic imaging of the human thyroid in vivo. Images were made 7 and 24 h after the oral administration of the positron-emitting radionuclide, sodium iodide 124I (with activites varying between 0.3 and 1 mCi), to patients scheduled for either partial thyroidectomy or radioiodine(More)
After receiving between 100 and 300 mu Ci of the positron-emitting radioisotope 124I (half-life, 4.2 days), 64 patients with a variety of thyroid disorders were imaged with a high resolution positron camera. A 3-dimensional image of the distribution of radioiodine uptake within the thyroid was obtained from a single 10- to 15-min scan. This image may be(More)
One early effect of the treatment of tumours by the new modality photodynamic therapy (PDT) is a reduction in tumour glucose levels. We have employed the widely used positron-emitting glucose analogue flurorine-18 fluoro-2-deoxy-d-glucose ([18F]-FDG), to determine whether, in principle, PDT-induced injury might be delineated non-invasively and(More)
A prototype positron camera has been constructed consisting of two high density avalanche chamber (HIDAC) detectors operated in coincidence with a resolving time (2 tau) of 40 nsec. The detectors are multiwire chambers, with specially constructed lead converters added to improve the photon detection efficiency at 511 keV. The current HIDAC detectors have a(More)
OBJECTIVE This study used high-resolution PET to explore the pattern of DIP joint bone metabolism to test the hypothesis that the nail was functionally integrated with the bone, based on patterns of distal phalange (DP) bone metabolism in PsA compared with OA and normal joints. METHODS A total of 234 DIP joints were scanned in 30 subjects (10 PsA, 10 OA,(More)
Large area positron cameras for three-dimensional imaging in medicine have been under development for several years at a number of centres (McKee er a1 1979, Bateman er a1 1980, Jeavons et a1 1981, Del Guerra er a1 1983), and some groups have reported clinical applications (Ott er a1 1983, Townsend et a1 1984). To reconstruct the data, an algorithm based on(More)
Co-registration of clinical images acquired using different imaging modalities and equipment is finding increasing use in patient studies. Here we present a method for registering high-resolution positron emission tomography (PET) data of the hand acquired using high-density avalanche chambers with magnetic resonance (MR) images of the finger obtained using(More)