Free-breathing dynamic contrast-enhanced imaging of the upper abdomen using motion insensitive cmpressed censing techniques

Congress:

ECR 2019

Poster Number:

C-2002

Type:

Scientific Exhibit

Keywords:

Abdomen, Pancreas, Liver, MR, Image manipulation / Reconstruction, Imaging sequences, Technology assessment, Artifacts, Cancer

Authors:

D. Hausmann¹, T. Niemann², D. Kreul¹, A. Nocito¹, M. Klarhöfer³, M. Nickel⁴, B. Kiefer⁴, R. A. Kubik-Huch¹; ¹Baden/CH, ²Nussbaumen/CH, ³Zürich/CH, ⁴Erlangen/DE

DOI:

10.26044/ecr2019/C-2002

DOI-Link:

https://dx.doi.org/10.26044/ecr2019/C-2002

Fig. 4: Besides extensive liver metastasis, bone (seen here) and adrenal metastases...

Fig. 3: 65-yo male patient with metastatic lung and liver lesions of unknown primary....

Fig. 1: Images of a 76-yo female patient with complicated renal cysts. Contours of...

Fig. 2: Images of a 85-yo female patient with impaired breath-hold capability. Initial...

Fig. 5: 43-yo female patient with a hepatic hemangioma (arrows). Multiphase cs fbVIBE...

Aims and objectives

Motion-induced artifacts are a well-known challenge for dynamic contrast- enhanced abdominal MR imaging. Especially elderly patients and severely ill patients are often unable to adequately perform breath-hold maneuvers with a risk of critically reduced image quality due to motion artifacts and consequently impaired interpretability of the imaging material. Recently fast multiphase contrast-enhanced sequences with artifact reduction by motion-insensitive radial acquisitions were introduced (1-3). Long reconstruction times and necessity of an external reconstruction server limited clinical applicability of these approaches for older MR systems. The purpose...

Methods and materials

So far, 20 datasets (10 fbVIBE/10 bhVIBE) were independently assessed by two experienced readers in this IRB-approved study. All fbVIBE/bhVIBE sequences (temporal resolution: approximately 11/18 seconds) were performed on state-of-the-art 1.5T clinical MRI scanners (MAGNETOM Avanto Fit/Aera, Siemens Healthcare, Erlangen, Germany). Initial cs reconstruction using hard-gating to reduce respiratory motion artifacts was carried out on the scanner during the examination (duration: approximately 8 minutes). Mann-Whitney U-tests were performed to compare image quality (IQ), delineation of structures (DoS), artifacts (A) and diagnostic confidence (DC), which were...

Results

Ratings for IQ/DoS/DC of fbVIBE (3.8±0.6/3.7±0.8/4±0.8; κ:>0.5) and bhVIBE (3.3±0.8/3.4±0.8/3.6±1; κ:>0.8) were moderate to high, while A was rated moderate to low (fb/bhVIBE: 2.5±1/2.8±1.1; κ:>0.4). Mann Whitney U-test showed no significant difference between IQ/DoS/DC of fb/bhVIBE (p=0.19/p=0.46/p=0.34), despite a trend towards superiority of fbVIBE was observed.

Conclusion

Fast fbVIBE using cs-reconstruction is technically feasible at a similar image quality compared to bhVIBE. Secondary cs-reconstruction will presumably further improve image quality. fbVIBE may be useful, particularly in elderly and/or severely ill patients with impaired breath-hold capabilities.

Personal information

PD Dr. med. Daniel Hausmann Leitender Arzt Leiter des Fachbereiches „Abdominale und Onkologische Diagnostik“ Kantonsspital Baden AG Institut für Radiologie CH-5404 Baden Telefon Zentrale +41 (0)56 486 21 11 Telefon direkt +41 (0)56 486 38 22 Telefax +41 (0)56 486 38 09 E-Mail:[email protected] www.ksb.ch

References

1. "One-Stop Shop": Free-Breathing Dynamic Contrast-Enhanced Magnetic Resonance Imaging of the Kidney Using Iterative Reconstruction and Continuous Golden-Angle Radial Sampling. Riffel P, Zoellner FG, Budjan J, Grimm R, Block TK, Schoenberg SO, Hausmann D. Invest Radiol. 2016 Nov;51(11):714-719. 2. Golden-angle radial sparse parallel MRI: combination of compressed sensing, parallel imaging, and golden-angle radial sampling for fast and flexible dynamic volumetric MRI. Feng L, Grimm R, Block KT, Chandarana H, Kim S, Xu J, Axel L, Sodickson DK, Otazo R. Magn Reson Med. 2014 Sep;72(3):707-17. 3....