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Prostate cancer detection with 3 T MRI: comparison of diffusion-weighted imaging and dynamic contrast-enhanced MRI in
Kazuhiro Kitajima1, Yasushi Kaji, Yoshitatsu Fukabori
1Department of Radiology, Dokkyo Medical University School of Medicine, Mibu, Japan.
Purpose:
To evaluate the diagnostic ability of diffusion-weighted imaging (DWI) and dynamic contrast-enhanced imaging (DCEI) in combination with T2-weighted imaging (T2WI) for the detection of prostate cancer using 3 T magnetic resonance imaging (MRI) with a phased-array body coil.
Materials And Methods:
Fifty-three patients with elevated serum levels of prostate-specific antigen (PSA) were evaluated by T2WI, DWI, and DCEI prior to needle biopsy. The obtained data from T2WI alone (protocol A), a combination of T2WI and DWI (protocol B), a combination T2WI and DCEI (protocol C), and a combination of T2WI plus DWI and DCEI (protocol D) were subjected to receiver operating characteristic (ROC) curve analysis.
Results:
The sensitivity, specificity, accuracy, and area under the ROC curve (Az) for region-based analysis were: 61%, 91%, 84%, and 0.8415, respectively, in protocol A; 76%, 94%, 90%, and 0.8931, respectively, in protocol B; 77%, 93%, 89%, and 0.8655, respectively, in protocol C; and 81%, 96%, 92%, and 0.8968, respectively in protocol D. ROC analysis revealed significant differences between protocols A and B (P = 0.0008) and between protocols A and D (P = 0.0004).
Conclusion:
In patients with elevated PSA levels the combination of T2WI, DWI, DCEI using 3 T MRI may be a reasonable approach for the detection of prostate cancer.
Insights
Combining T2-weighted imaging (T2WI), diffusion-weighted imaging (DWI), and dynamic contrast-enhanced imaging (DCEI) with 3 T MRI improves prostate cancer detection in patients with elevated prostate-specific antigen (PSA) levels.
Area of Science:
- Radiology
- Oncology
- Medical Imaging
Background:
- Prostate cancer diagnosis relies on accurate imaging.
- Elevated prostate-specific antigen (PSA) levels necessitate further investigation.
- 3 Tesla (3T) MRI offers advanced visualization capabilities.
Purpose of the Study:
- To assess the diagnostic performance of combined MRI sequences for prostate cancer detection.
- To compare the efficacy of T2-weighted imaging (T2WI) alone versus combined T2WI with DWI and/or DCEI.
- To evaluate 3T MRI with a phased-array body coil for prostate cancer diagnosis.
Main Methods:
- Fifty-three patients with elevated PSA underwent 3T MRI including T2WI, DWI, and DCEI before biopsy.
- Data were analyzed using four protocols: T2WI alone (A), T2WI+DWI (B), T2WI+DCEI (C), and T2WI+DWI+DCEI (D).
- Receiver operating characteristic (ROC) curve analysis was performed to determine diagnostic accuracy.
Main Results:
- The combined T2WI+DWI+DCEI protocol (D) achieved the highest sensitivity (81%), specificity (96%), and accuracy (92%).
- Protocol D demonstrated the largest area under the ROC curve (Az = 0.8968), indicating superior diagnostic ability.
- Significant improvements in diagnostic performance were observed when adding DWI (protocol B) and the full combination (protocol D) compared to T2WI alone (protocol A).
Conclusions:
- The combination of T2WI, DWI, and DCEI using 3T MRI is a valuable approach for detecting prostate cancer.
- This multi-parametric MRI technique enhances diagnostic accuracy in patients with elevated PSA.
- The findings suggest that comprehensive MRI protocols improve the detection of prostate cancer.
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