The interpolated projection data estimation method improves the image quality of myocardial perfusion SPECT with a short acquisition time.

Objective: The interpolated projection data estimation processing (IPDE) method increases the amount of projection data by interpolation of the projection data. We examined the usefulness of the IPDE method for (201)Tl myocardial perfusion imaging (MPI) single photon emission computed tomography (SPECT) with a short acquisition time.

Methods: Forty patients with suspected ischemic heart disease underwent stress (201)Tl-MPI SPECT.

Improvement of image quality using interpolated projection data estimation method in SPECT.

Objective: General data acquisition for single photon emission computed tomography (SPECT) is performed in 90 or 60 directions, with a coarse pitch of approximately 4-6 degrees for a rotation of 360 degrees or 180 degrees , using a gamma camera. No data between adjacent projections will be sampled under these circumstances. The aim of the study was to develop a method to improve SPECT image quality by generating lacking projection data through interpolation of data obtained with a coarse pitch such as 6 degrees .

[Evaluation of the OS-EM parameter with automatic quantitative analysis for cerebral blood flow of the ECD tool].

The parameters of reconstruction iteration and subset of the ordered subset expectation maximization (OS-EM) method have a great impact on image quality. In a cerebral blood flow (CBF) examination, it is critical to produce consistent results when analyzing clinical data. We evaluated the number of iterations and subset of the OS-EM method to stabilize image quality using a normal case and an infarction case.