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A prototype MR insertable brain PET using tileable GAPD arrays
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10.1118/1.4793754
/content/aapm/journal/medphys/40/4/10.1118/1.4793754
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/4/10.1118/1.4793754

Figures

Image of FIG. 1.
FIG. 1.

MR-compatible brain PET system consisting of PET detectors, analog and digital electronics.

Image of FIG. 2.
FIG. 2.

The 4 × 4 matrix LYSO crystals and 4 × 4 array GAPD used to construct the PET detector module.

Image of FIG. 3.
FIG. 3.

PET detector module and preamplifiers board connected using a flexible flat cable (FFC) of 300 cm long (a) and photograph of the fabricated position decoder circuit board (b).

Image of FIG. 4.
FIG. 4.

Schematic drawing of the signals, ground, and bias voltages lines in a FFC.

Image of FIG. 5.
FIG. 5.

Illustration of PET/MRI integration showing the placement of the PET gantry, RF coil, and shielding box.

Image of FIG. 6.
FIG. 6.

Frontal (a) and rear (b) view of the PET gantry with the RF coil placed inside 3-T MRI.

Image of FIG. 7.
FIG. 7.

Energy spectra from 64 channels of a PET detector block. Gaussian function fitted line to the spectra are shown.

Image of FIG. 8.
FIG. 8.

Count rate changes of the PET system during image acquisition time: (a) operated inside and outside MRI and (b) operated inside MRI with MR SE or GE sequence.

Image of FIG. 9.
FIG. 9.

PET (a), MRI (b), and fused images (c) of a hot-rod phantom acquired with the GE (top) and SE (bottom) sequences.

Image of FIG. 10.
FIG. 10.

PET (a) and fused images (c) of a 3D Hoffman brain phantom simultaneously acquired with SE sequence (b).

Image of FIG. 11.
FIG. 11.

PET images of a 3D Hoffman brain phantom acquired with the PET system operated inside the MRI system during a simultaneous MR SE sequence (a) and acquired outside the MRI (b). MR images of a 3D Hoffman brain phantom taken with the PET insert acquiring PET data (d) and in comparison with MR images of the 3D Hoffman brain phantom acquired without the PET insert (e). The MR images were acquired with the SE sequence. The profiles are drawn through the PET images (c) and MR images (f). The profile (f) of the MR image (d) acquired with the PET system inside the MRI showed a lower signal towards the edges of the FOV. Note that SNR of the MR image (d) was improved after the RF coil retuning with the PET system. A little distortion on the top of the MR image (d) was caused by an air bubble inside the phantom.

Tables

Generic image for table
TABLE I.

Design parameters of the MR-compatible brain PET.

Generic image for table
TABLE II.

Specification of the 4 × 4 array GAPD used for PET detector module.

Generic image for table
TABLE III.

Effect of MR sequences on PET insert.

Generic image for table
TABLE IV.

Effect of PET insert on MR phantom images.

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/content/aapm/journal/medphys/40/4/10.1118/1.4793754
2013-03-13
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A prototype MR insertable brain PET using tileable GAPD arrays
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/4/10.1118/1.4793754
10.1118/1.4793754
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