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Usefulness of high b-value diffusion-weighted MRI in the diagnosis of Creutzfeldt-Jakob disease
E Riva-Amarante1, A Jiménez-Huete, R Toledano
1Servicio de Neurología, Hospital Ruber Internacional, Madrid, Spain. eriva@ruberinternacional.es
Background:
current diagnostic criteria of probable Creutzfeldt-Jakob disease (CJD) include a combination of clinical, EEG and analytic data. Recent data indicate that brain MRI including fluid-attenuated inversion recovery (FLAIR) and diffusion-weighted imaging (DWI) sequences can be a valid and reliable tool for the diagnosis of CJD. We describe our experience with high b-value (3000s/mm(2)) diffusion-weighted imaging (DWI) in patients with probable or definite CJD and compare it with standard b-value (1000s/mm(2)) DWI.
Methods:
we performed a retrospective analysis of patients admitted to our Hospital Service between 2002 and 2008 with a final diagnosis of probable or definite CJD. Patients were examined using either a 1.5 Tesla or a 3 Tesla MRI. The MRI protocol included T1-weigthed spin-echo sequences, T2-weighted fast spin-echo, FLAIR and DWI sequences with high b-value and standard b-value.
Results:
during the study period there were 7 patients with probable or definite CJD. Only 3 patients (43%) showed changes on FLAIR sequence consistent with CJD. All the cases were detected with high b-value DWI, including 2 cases (28%) that would have been missed using standard b-value (1000s/mm(2)) DWI. In all the patients the changes were more conspicuous and extensive at high b-value DWI (b=3000s/mm(2)).
Conclusion:
our data indicate that high b-value DWI may improve the sensitivity of brain MRI for the diagnosis of CJD, allowing the detection of some cases that would have been overlooked by conventional sequences.
Insights
High b-value diffusion-weighted imaging (DWI) significantly improves the detection of Creutzfeldt-Jakob disease (CJD) on MRI. This advanced DWI technique identifies more CJD cases than standard sequences, enhancing diagnostic sensitivity.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Current Creutzfeldt-Jakob disease (CJD) diagnosis relies on clinical, EEG, and analytic data.
- Brain MRI, particularly FLAIR and DWI, shows promise for CJD diagnosis.
- This study evaluates high b-value DWI for CJD detection.
Purpose of the Study:
- To assess the diagnostic utility of high b-value (3000s/mm(2)) DWI in patients with probable or definite CJD.
- To compare the sensitivity of high b-value DWI with standard b-value (1000s/mm(2)) DWI and FLAIR sequences.
Main Methods:
- Retrospective analysis of 7 patients with probable or definite CJD (2002-2008).
- MRI examinations included T1, T2, FLAIR, standard b-value DWI, and high b-value DWI (b=3000s/mm(2)).
- Scans were performed on 1.5T or 3T MRI scanners.
Main Results:
- High b-value DWI detected all 7 CJD cases.
- Only 43% of patients showed CJD-consistent changes on FLAIR.
- High b-value DWI identified 2 cases (28%) missed by standard b-value DWI.
- Changes were more conspicuous and extensive with high b-value DWI.
Conclusions:
- High b-value DWI enhances MRI sensitivity for CJD diagnosis.
- This technique can detect CJD cases missed by conventional MRI sequences.
- High b-value DWI is a valuable tool for improving CJD detection.
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