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In fact, a side-by-side comparison of TRUS versus MRI-guided targeted biopsy that was conducted as a prospective, investigator-blinded study demonstrated that MRI-guided biopsy improved detection of significant prostate cancer by 17.7%, and decreased the diagnosis of insignificant or low-risk disease by 89.4%. [12]
The field strength of the magnet is measured in teslas – and while the majority of systems operate at 1.5 T, commercial systems are available between 0.2 and 7 T. 3T MRI systems, also called 3 Tesla MRIs, have stronger magnets than 1.5 systems and are considered better for images of organs and soft tissue. [7]
This is a special MRI sequence that shows the myelin's percentage of water content. [25] Pattern III lesions, including Baló lesions, have a specific initiation pattern under MRI (MRILIP) consisting in showing Gadolinium enhancement before FLAIR MRI appearance. [26] Under 7-Tesla MRI Ball lesions show a center vein, like in MS. [27]
A similar paper in European Radiology found that when correlated with histopathology, PI-RADS v2 correctly identified 94-95% of prostate cancer foci ≥0.5 mL, but was limited for the assessment of GS ≥4+3 (significant) tumors ≤0.5 mL; in their series, DCE-MRI offered limited added value to T2WI+DW-MRI. [7]
a needle biopsy taken via the rectum and, surgical removal of prostate tissue: transurethral resection of the prostate - removal of extra prostate tissue to improve urination (a treatment for benign prostatic hyperplasia), radical prostatectomy - complete removal of prostate and seminal vesicles (a treatment for prostate cancer).
MRI results can help distinguish those who have potentially dangerous tumors from those who do not. [26] A definitive diagnosis of prostate cancer requires a biopsy of the prostate. Prostate biopsies are typically taken by a needle passing through the rectum or perineum, guided by transrectal ultrasonography, MRI, or a combination of the two.
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