maxPET: A dedicated mammary and axillary region PET imaging system for breast cancer

N. K. Doshi, R. W. Silverman, Y. Shao, Simon R Cherry

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

In this paper, we present initial measurements from a high-performance prototype dedicated PET camera (maxPET) designed for mammary and axillary region imaging. The system consists of two 15×15 cm2 planar scintillation detector plates operating in coincidence, with each plate composed of 25 modular detectors. The modular detectors are comprised of a 9×9 array of 3 ×3×20 mm3 lutetium oxyorthosilicate (LSO) detector elements, read out by a position-sensitive photomultiplier tube (PS-PMT). A multiplexing readout scheme is used to reduce the number of readout channels from 200 (4X and 4Y readouts per PS-PMT) to 8 channels per plate. The detectors have a measured intrinsic spatial resolution of 2.3 mm. Over 95% of the 4050 crystals in the system can be identified in flood histograms of the detector plates. The coincidence timing resolution for the entire system is 8.1 ns. A line source phantom was scanned with the system and images reconstructed using focal plane tomography. The estimated resolution in projection images is 4 mm based on profiles taken through the line source phantom images. The goal of the maxPET system will be to aid in breast cancer patient management by assisting in imaging women with dense fibro-glandular breasts, detecting axillary lymph node metastases without surgery, and monitoring chemotherapy effectiveness. Future research on the maxPET system will focus on changes to the electronics to improve count rate performance and timing resolution and the mounting of the detectors on a rotating gantry for tomographic studies.

Original languageEnglish (US)
Pages (from-to)811-815
Number of pages5
JournalIEEE Transactions on Nuclear Science
Volume48
Issue number3 II
DOIs
StatePublished - Jun 2001

Fingerprint

breast
Imaging systems
cancer
Detectors
detectors
readout
Photomultipliers
photomultiplier tubes
Lutetium
Imaging techniques
time measurement
Scintillation counters
Chemotherapy
gantry cranes
lutetium
Mountings
Multiplexing
lymphatic system
Surgery
metastasis

Keywords

  • Breast cancer
  • FDG
  • Fiber optic tapers
  • Imaging detectors
  • LSO
  • Positron emission tomography (PET)

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

Cite this

maxPET : A dedicated mammary and axillary region PET imaging system for breast cancer. / Doshi, N. K.; Silverman, R. W.; Shao, Y.; Cherry, Simon R.

In: IEEE Transactions on Nuclear Science, Vol. 48, No. 3 II, 06.2001, p. 811-815.

Research output: Contribution to journalArticle

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