Improvement of Extended FOV artifacts by reconstruction Algorithm and bolus

Congress:

ECR 2019

Poster Number:

C-0129

Type:

Scientific Exhibit

Keywords:

Physics, CT, Radiographers, Trauma

Authors:

T. Esaki, T. Kawashima; Shimotsuke City/JP

DOI:

10.26044/ecr2019/C-0129

DOI-Link:

https://dx.doi.org/10.26044/ecr2019/C-0129

Fig. 1: The reconstruction range of SFOV of the device used is 500 mm, but that of EFOV...

Fig. 2: Reduction of the CT value and distortion occur on imaging of an object present...

Aims and objectives

Extended field of view (EFOV) algorithms to estimate the projection data outside the SFOV have been reported¹⁾. EFOV is capable of reconstructing images of wider FOV than SFOV (Fig. 1), but EFOV algorithms cause image distortion and CT value reduction²⁾(Fig. 2).

We reported that bolus improves eFOV distortion and CT value decrease at ECR 2017, 2018. HD FOV Pro is SIEMENS's new eFOV algorithm.

However Siemens' new eFOV algorithm, HD FOV Pro was announced.

The purpose of this study was to compare distortion and CT value decrease between eFOV and HD FOV Pro and to examine the effect of bolus on HD FOV Pro distortion and CT value decrease improvement effect.