Abstract
Background: Radiology holds an important role in evaluating patients with suspected stroke. It istherefore important to distinguish hyperacute or acute. DWI-ADC is an important modality. For ADC valuemeasurement, it is more accurate to use multiple b value. There is a significant variability of ADC values inMRI depending on the coil system, imager, vendor, magnetic field strength and multicentre. The purpose ofthe study is to find out the difference of ADC value in hyperacute and acute stroke. Analytical observationalstudy with cross sectional study approach to determine ADC values differences in Saiful Anwar HospitalMalang. Head MRI of 3T with 3 b values (0, 500, 1000) was performed on every subject. The data wereanalysed using descriptive statistic.Results: There were 12 subjects observed, 6 in the hyperacute group (onset <24 hours) and acute (onset 24hours - 1 week). There was a significant difference with p<0.05 on average ADC (10-3 mm2/s) and rADC(%) values between the hyperacute and acute groups. The ADC average mean ±SD of hyperacute (0.23 ±0.05) was lower than acute (0.37 ± 0.04), and so as the ±SD rADC mean value of hyperacute (32 ± 8.1) wasless than acute (52 ± 4.3).Conclusion: The ADC and rADC average values in the hyperacute were lower than that in the acute group.
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