7th Conference on PET/MR and SPECT/MR

Session

Session 9 - Software and Quantification: attenuation correction – part 2

22 May 2018, 18:00

La Biodola, Isola d'Elba

Conveners

Session 9 - Software and Quantification: attenuation correction – part 2

• Niccolò Camarlinghi (University of Pisa and INFN Pisa, Italy)

9. Perfect In-Phase ZTE Imaging for Improved MR Attenuation Correction

Gaspar Delso (GE Healthcare)

22/05/2018, 18:00

Talk

This work details a new approach to acquire and reconstruct zero echo-time (ZTE) data, aimed at removing chemical shift artifacts which is impairing pseudo-CT generation. In order to achieve this a multi-repetition readout scheme was implemented, where consecutive echoes were acquired with different read-out bandwidths (rBW). In the reconstruction data was separated into an in-phase, and an...

35. Accuracy when using R2* as a measure of bone density in PET/MRI: Evaluation using 775 subjects

Amalie Hindsholm (Rigshospitalet)

22/05/2018, 18:20

Talk

AIM: Accurate MR-based attenuation correction (MR-AC) for use in combined clinical PET/MR systems is crucial in order to achieve quantifiable PET images. The main challenge has been to represent continuous bone density. The ultra-short echo time (UTE) MR sequence has been proposed in several methods to be utilized for representation of bone, subsequently extracted using an R2*-map. The...

13. Effect of Spatial Resolution on ZTE-based Attenuation Correction

Gaspar Delso (GE Healthcare)

22/05/2018, 18:40

Talk

In brain PET/MR, the zero echo-time (ZTE) pulse sequence has already been shown to be a valuable tool to derive pseudo-CT and attenuation correction maps thanks to its ability to capture the short T2* signal from bone tissue. Most studies in this area have used a moderate resolution (2.4 mm) to minimize the acquisition time in a generic clinical setting and few studies have used a high...