Although D-SPECT uses a parallel hole collimator and Anger camera parallel hole collimator efficiency does not change with distance, D-SPECT sensitivity should decrease with increased distance from the heart.
Projection data were acquired using a 20%% energy window centred on the 208 keV photopeak using a parallel-hole medium energy low penetration (MELP) collimator.
In vivo planar imaging of AMI in rats was performed on a gamma camera using a parallel-hole collimator.
Sixty-four projections were acquired with a 10-s acquisition time per projection using a parallel-hole collimator and a radius of rotation of 3.8 cm.
Initial results are presented obtained using the current detector with a parallel hole collimator to image thin capillary phantoms filled with a 99mTc water solution.
A British expedition to drill through 3km (1.8 miles) of Antarctic ice into Lake Ellsworth was called off late last year after engineers were unable to join the main borehole with a parallel hole that was to be used to recover drilling water.
All images were obtained using a dual-detector gamma camera (Millennium MG, General Electric, Elgems, Tirat Carmel, Israel) equipped with a parallel hole, low-energy, high-resolution collimator.
Twenty minutes and 2 hours after injection, scintigraphic images were obtained using a large-field-of-view gamma camera (Orbiter, Siemens, IL, USA) equipped with a parallel hole, low energy and a high resolution collimator.
The fan beam collimator showed increased counting efficiency in comparison to a parallel hole collimator.
He used a parallel which struck me.
