Journal of magnetic resonance imaging : JMRI
-
J Magn Reson Imaging · Nov 2008
Apparent diffusion coefficient: prostate cancer versus noncancerous tissue according to anatomical region.
To evaluate diagnostic performance of apparent diffusion coefficient (ADC) in differentiating prostate cancer from noncancerous tissue according to anatomical region. ⋯ Variable ADC in noncancerous tissue according to anatomical region may limit diagnostic performance of ADC for cancer detection.
-
J Magn Reson Imaging · Nov 2008
Minimum detectable change in motor and prefrontal cortex activity over repeated sessions using 3T functional MRI and a block design.
To determine the minimum detectable change (MDC) in functional magnetic resonance imaging (fMRI) measurements of brain activity over repeated sessions with 95% confidence using a block design of tasks. ⋯ fMRI measurements that quantify the strength of activity in response to tasks and centers of mass offer sensitive measurements of change over repeated imaging sessions. fMRI can be used for serial investigations of individual participants using simple motor and cognitive tasks using a simple block design.
-
J Magn Reson Imaging · Nov 2008
Comparative StudyAbility of diffusion-weighted imaging for the differential diagnosis between chronic expanding hematomas and malignant soft tissue tumors.
To evaluate the potential of diffusion-weighted imaging (DWI) in distinguishing chronic expanding hematomas (CEHs) from malignant soft tissue tumors. ⋯ DWI is useful for differentiating between CEHs and malignant soft tissue tumors.
-
J Magn Reson Imaging · Nov 2008
Enhanced mass on contrast-enhanced breast MR imaging: Lesion characterization using combination of dynamic contrast-enhanced and diffusion-weighted MR images.
To evaluate the diagnostic accuracy of a combination of dynamic contrast-enhanced MR imaging (DCE-MRI) and diffusion-weighted MR imaging (DWI) in characterization of enhanced mass on breast MR imaging and to find the strongest discriminators between carcinoma and benignancy. ⋯ The combination of DWI and DCE-MRI could produce high diagnostic accuracy in the characterization of enhanced mass on breast MR imaging.
-
J Magn Reson Imaging · Nov 2008
Safety of localizing epilepsy monitoring intracranial electroencephalograph electrodes using MRI: radiofrequency-induced heating.
To investigate heating during postimplantation localization of intracranial electroencephalograph (EEG) electrodes by MRI. ⋯ MRI for intracranial electrode localization can be performed safely at both 1.5T and 3T provided a head-transmit coil is used, electrode leads are separated, and scanner-reported SARs are limited as determined in advance for specific scanner models, RF coils and implant arrangements. Neglecting these restrictions may result in tissue injury.