Magnetic resonance imaging of the TMJ disc in asymptomatic volunteers
LT Kircos, DA Ortendahl, AS Mark… - Journal of oral and …, 1987 - Elsevier
Forty-two temporomandibular joints (TMJs) in 21 asymptomatic volunteers were visualized
by magnetic resonance imaging (MRI). The subjects, 12 males and nine females, were …
by magnetic resonance imaging (MRI). The subjects, 12 males and nine females, were …
Signal to noise in derived NMR images
DA Ortendahl, NM Hylton, L Kaufman… - Magnetic Resonance …, 1984 - Wiley Online Library
The NMR image is dependent on multiple tissue parameters: hydrogen density, relaxation
times T 1 and T 2 , and flow. From the acquired intensity images, T 1 , T 2 , and hydrogen …
times T 1 and T 2 , and flow. From the acquired intensity images, T 1 , T 2 , and hydrogen …
The value of relaxation times and density measurements in clinical MRI
…, NM HYLTON, DA ORTENDAHL… - Investigative …, 1987 - journals.lww.com
The hope that MRI relaxation time signatures would identify tissues, specifically, malignancies,
has not been realized. This is due much less to measurement inaccuracies than to a …
has not been realized. This is due much less to measurement inaccuracies than to a …
The utility of principal component analysis for the image display of brain lesions. A preliminary, comparative study
U Schmiedl, DA Ortendahl, AS Mark… - Magnetic …, 1987 - Wiley Online Library
Principal component analysis (PCA), a common tool from multivariate statistical analysis, has
been implemented into the computer display system of a MR imaging device. PCA allows …
been implemented into the computer display system of a MR imaging device. PCA allows …
Analysis of hybrid imaging techniques
DA Ortendahl, L Kaufman… - Magnetic resonance in …, 1992 - Wiley Online Library
Hybrid imaging techniques have been proposed as a means of decreasing imaging time
without the cost and technical constraints of echo planar imaging. With this technique phase …
without the cost and technical constraints of echo planar imaging. With this technique phase …
Segmentation of magnetic resonance images using fuzzy clustering
DA Ortendahl, JW Carlson - Information processing in medical imaging, 1988 - Springer
Magnetic Resonance Imaging (MRI) is unique among imaging modalities in that image
contrast can be varied over a wide range by manipulation of the acquisition parameters. The …
contrast can be varied over a wide range by manipulation of the acquisition parameters. The …
Fluoroscopic MR imaging at 0.064 Tesla
…, C Hawryszko, DA Ortendahl… - IEEE transactions on …, 1991 - ieeexplore.ieee.org
The authors developed a system for ultrafast magnetic resonance imaging (MRI) protocols at
low field. The system design permits the acquisition of the raw data in the background while …
low field. The system design permits the acquisition of the raw data in the background while …
High resolution emission computed tomography with a small germanium camera
DA Ortendahl, L Kaufman, W Rowan… - … on Nuclear Science, 1980 - ieeexplore.ieee.org
The imaging capabilities of the germanium camera, (high spatial resolution and scatter rejection)
combined with processing to recover loss of resolution at depth, have resulted in single-…
combined with processing to recover loss of resolution at depth, have resulted in single-…
Automated tissue characterization with NMR imaging
DA Ortendahl, NM Hylton, L Kaufman… - Information Processing in …, 1984 - Springer
Nuclear magnetic resonance imaging is a rapidly evolving modality which has aroused great
excitement in the medical community (1,2). NMR has shown excellent soft tissue contrast …
excitement in the medical community (1,2). NMR has shown excellent soft tissue contrast …
Investigation of partial flip angle magnetic resonance imaging
TC Mills, DA Ortendahl, NM Hylton - 1986 - osti.gov
For magnetic resonance imaging (MRI) of the head a TR of about 2.0 seconds has been found
to give excellent sensitivity to desease. If a flip angle less than 90/sup 0/ is used for initial …
to give excellent sensitivity to desease. If a flip angle less than 90/sup 0/ is used for initial …