Work

Image properties of list mode likelihood reconstruction for a rectangular positron emission mammograph with DOI measurements

Year: 2002

Type: conference-paper

Abstract: A positron emission mammography scanner is under development at our Laboratory. The tomograph has a rectangular geometry consisting of four banks of detector modules. For each detector, the system can measure the depth of interaction information inside the crystal. The rectangular geometry leads to irregular radial and angular sampling and spatially variant sensitivity that are different from conventional PET systems. Therefore, it is of importance to study the image properties of the reconstructions. We adapted the theoretical analysis that we had developed for conventional PET systems to the list mode likelihood reconstruction for this tomograph. The local impulse response and covariance of the reconstruction can be easily computed using FFT. These theoretical results are also used with computer observer models to compute the signal-to-noise ratio for lesion detection. The analysis reveals the spatially variant resolution and noise properties of the list mode likelihood reconstruction. The theoretical predictions are in good agreement with Monte Carlo results.

Source: IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

DOI: 10.1109/nssmic.2000.950047

Authors: Jinyi Qi, R.H. Huesman

Institution: Lawrence Berkeley National Laboratory

Language: English

Topic: Medical Imaging Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funders: U.S. Department of Energy, U.S. Department of Health and Human Services, Office of Science, Biological and Environmental Research