Quantitative and qualitative evaluation of MRI T1-weighted sequence SMS TSE versus conventional TSE in knee imaging at 1.5T Tesla MRI scanner

Congress:

ECR 2020

Poster Number:

C-03049

Type:

Scientific Exhibit

Keywords:

Performed at one institution, Diagnostic or prognostic study, Prospective, Trauma, Technical aspects, Imaging sequences, Comparative studies, MR, Image manipulation / Reconstruction, Musculoskeletal soft tissue, Musculoskeletal joint, MRI

Authors:

W. K. Chung¹, M. C. W. Liu², R. Lee², P. L. P. Chan², W. W. Li¹, C. T. Yuen², J. tang¹, K. S. F. Kong¹, K. M. Chan²; ¹Hong Kong, NA/CN, ²Hong Kong/CN

DOI:

10.26044/ecr2020/C-03049

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-03049

Fig. 4: Scores by radiologists in terms of visualization of ACL, PCL, intercondylar...

Fig. 2: Sagittal images of knee using SMS (left) and conventional (right) TSE...

Purpose

To compare the (1) signal-to-noise ratio (SNR) and (2) contrast-to-noise ratio (CNR) of anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) using Simultaneous Multi-Slice(SMS) turbo spin echo (TSE) technique to those of conventional TSE at 1.5 Tesla MRI scanner To compare the image quality and hence diagnostic value of images using two different MR imaging techniques (SMS vs conventional),in terms of visualization of critical anatomies, such as ACL, PCL, intercondylar fat, meniscus and tendons

Methods and materials

Five healthy volunteers were scanned at a 1.5T Siemens system with sagittal T1-weighted SMS TSE and conventional TSE sequences. SNR and CNR comparison (Fig.1) Signals of anterior cruciate ligament, posterior cruciate ligament and the fat of intercondylar fossa were measured. Signal of background was measured as well. SNRs of ACL and PCL were calculated by dividing the corresponding signals with that of background. CNRs of ACL and PCL were calculated by subtracting the corresponding signals from that of the fat of intercondylar fossa, and then...

Results

SNR and CNR comparison (Fig.3) Quantitative analysis showed that there were no significant differences between the mean SNRs of ACL (p=0.23) and PCL (p=0.40)of the two sequences. Meanwhile, no significant differences of CNRs were found, as well, for both ACL/fat of the intercondylar fossa (p=0.12) and the PCL/fat of the intercondylar fossa (p=0.51). Image Quality comparison (Fig.4) No significant differences were found between two techniques for both readers, while one reader showed her preference towards SMS images.

Conclusion

No statistically significant differences were found for both quantitative and qualitative measurements between conventional TSE and SMS TSE imaging. T1-weighted SMS TSE imaging technique enabled scan time reduction while maintaining image quality in the diagnosis of ligamentous injury of knee joint.

Personal information and conflict of interest

W. K. Chung; Hong Kong, NA/CN - nothing to disclose W. W. Li; Hong Kong, NA/CN - nothing to disclose M. C. W. Liu; Hong Kong/CN - nothing to disclose C. T. Yuen; Hong Kong/CN - nothing to disclose J. Tang; Hong Kong, NA/CN - nothing to disclose P. L. P. Chan; Hong Kong/CN - nothing to disclose R. Lee; Hong Kong/CN - nothing to disclose K. S. F. Kong; Hong Kong, NA/CN - nothing to disclose K. M. M. Chan; Hong Kong/CN - nothing...

References

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