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[MRI of focal liver lesions using a 1.5 turbo-spin-echo technique compared with spin-echo technique]
S Steiner1, T J Vogl, P Fischer
1Strahlenklinik und Poliklinik Universitätsklinikum Rudolf Virchow, Freie Universität Berlin.
Aim:
The aim of our study was to evaluate a T2-weighted turbo-spinecho sequence in comparison to a T2-weighted spinecho sequence in imaging focal liver lesions.
Methods:
In our study 35 patients with suspected focal liver lesions were examined. Standardised imaging protocol included a conventional T2-weighted SE sequence (TR/TE = 2000/90/45, acquisition time = 10.20) as well as a T2-weighted TSE sequence (TR/TE = 4700/90, acquisition time = 6.33). Calculation of S/N and C/N ratio as a basis of quantitative evaluation was done using standard methods. A diagnostic score was implemented to enable qualitative assessment.
Results:
In 7% (n = 2) the TSE sequence enabled detection of further liver lesions showing a size of less than 1 cm in diameter. Comparing anatomical details the TSE sequence was superior. S/N and C/N ratio of anatomic and pathologic structures of the TSE sequence were higher compared to results of the SE sequence.
Conclusion:
Our results indicate that the T2-weighted turbo-spinecho sequence is well appropriate for imaging focal liver lesions, and leads to reduction of imaging time.
Insights
The T2-weighted turbo-spinecho (TSE) sequence is effective for imaging focal liver lesions, offering superior anatomical detail and reduced scan times compared to conventional T2-weighted spin-echo (SE) sequences.
Area of Science:
- Radiology
- Medical Imaging
Background:
- Focal liver lesions require accurate imaging for diagnosis.
- Conventional T2-weighted spin-echo (SE) sequences are standard but can be time-consuming.
Purpose of the Study:
- To compare the efficacy of T2-weighted turbo-spinecho (TSE) sequences against conventional T2-weighted SE sequences for imaging focal liver lesions.
Main Methods:
- 35 patients with suspected focal liver lesions were scanned using both T2-weighted SE and TSE sequences.
- Quantitative analysis included signal-to-noise (S/N) and contrast-to-noise (C/N) ratios.
- Qualitative assessment used a diagnostic scoring system.
Main Results:
- The TSE sequence detected smaller lesions (<1 cm) in 7% of cases.
- TSE demonstrated superior visualization of anatomical details.
- Higher S/N and C/N ratios were observed with the TSE sequence for both normal and pathological structures.
Conclusions:
- T2-weighted TSE sequences are well-suited for imaging focal liver lesions.
- TSE sequences offer improved lesion detection and image quality while reducing examination time.