Comparative risk of operation and expectant management for carotid artery disease.
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Adult↗
Biomedical subjects
W S Moore
Publications and source records attributed to W S Moore.
The accuracy of carotid back pressure as an index for shunt requirements. A reappraisal.
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Adult↗
Relationship of transient ischemic attacks and angiographically demonstrable lesions of carotid artery.
Eighty-eight percent of arteries in patients with amaurosis fugax or hemispheric transient ischemic attacks had angiographically demonstrable lesions at the carotid bifurcation. Eighty-one percent had stenoses or occlusions at the carotid bifurcation; 7 percent had ulcerative lesions without stenoses at this site. Forty-nine percent of arteries in these patients demonstrated ulcerative lesions with or without stenosis at the carotid bifurcation. There was no significant difference in the incidence or types of ulcerations between those patients with amaurosis fugax and those with hemispheric transient ischemic attacks. Eighty-eight percent of arteries examined in this series were amenable to surgical reconstruction. Amaurosis fugax and hemispheric transient ischemic attacks were of equal value in predicting the possibility of a surgically treatable lesion at the carotid bifurcation.
Blindness↗
Progressive facial hemiatrophy (Parry-Romberg syndrome).
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Diagnosis, Differential↗
Diagnostic utility of thermal printed panographs compared with corresponding computer monitor images.
Digital panoramic radiographs may be viewed with computer monitors or archived as thermal or laser prints. To compare the available diagnostic information from thermal print images to that of corresponding computer monitor images, four calibrated evaluators performed a qualitative analysis of 13 specified anatomic features in 60 pairs of digital panoramic images presented in random order on a computer monitor and as thermal printed images. Each anatomic site was rated both for subjective diagnostic quality and diagnostic utility using a nominal scale. Computer monitor images more often were subjectively judged to have better quality. Within the parameters of this study, both formats had acceptable diagnostic utility for the majority of the anatomic features evaluated.
Calibration↗
Proceedings: The natural history of aorto-bilateral femoral by-pass grafts for lower ejxtremity ischemia.
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Aorta↗
Intraoperative monitoring and use of the internal shunt during carotid endarterectomy.
Carotid endarterectomy can be an effective form of therapy in stroke prevention in patients with carotid artery disease. A perioperative stroke is not only a devastating complication but negates the beneficial effects of the procedure. Careful attention to detail will prevent embolization during carotid endarterectomy and thus avoid the most common cause of perioperative cerebral infarction. The maintenance of adequate cerebral perfusion during carotid endarterectomy can be provided with the use of a shunt during carotid cross-clamping. This is necessary in approximately 15% of patients. Different approaches to the use of a shunt during carotid endarterectomy are discussed with their merits and disadvantages. Assessment of the technical results prior to completion of the operation should be an integral part of the procedure. The available methods, with their inherent limitations, are briefly discussed.
Angiography↗
What's new in peripheral vascular surgery.
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Aneurysm↗
The application of NMR imaging to the evaluation of pituitary and juxtasellar tumors.
Nuclear magnetic resonance (NMR) imaging was used to evaluate pituitary and juxtasellar tumors in 37 patients representing a wide range of pathology. The value of the multiplanar facility of NMR is emphasized in providing accurate volumetric information and establishing the topographical relation of tumors to adjacent structures. Current limitations of the method and possible future developments to improve diagnostic precision are discussed.
Acromegaly↗
The role of NMR imaging in the diagnosis and management of acoustic neuroma.
Nuclear magnetic resonance (NMR) scans of 15 patients with acoustic neuroma are compared with the results of computed tomography (CT). The absence of signal from bone has meant that the images are unaffected by artifacts and that small intracanalicular tumors can be visualized. The multiplanar facility of NMR is emphasized as this allows precise assessment of both tumor volume and its relationship to the ventricular system, brainstem, and tentorial hiatus. The different appearances produced by alternative scan sequences are illustrated and the possibility of predicting the physical constitution from scan appearances is discussed.
Cerebellar Neoplasms↗
Craniovertebral junction pathology: assessment by NMR.
In nuclear magnetic resonance (NMR) studies choice of imaging plane is achieved by a variety of methods that restrict data collection to the desired region. This means that the additional perspectives of direct sagittal and coronal views are possible. In sections traversing the brainstem and cervical cord the neural tissue is clearly seen contrasted against the surrounding cerebrospinal fluid (CSF). NMR studies of a wide variety of lesions in the vicinity of the craniovertebral junction, including congenital and acquired bony deformities, intrinsic tumors, and syringomyelia, are evaluated. It is concluded that the assessment of clinical problems involving this region is simplified by NMR imaging and that its use will probably allow more invasive procedures to be avoided.
Brain Neoplasms↗
NMR imaging in the evaluation of orbital tumors.
The application of nuclear magnetic resonance (NMR) imaging to the diagnosis of orbital space-occupying lesions was studied in group of 28 patients with a wide range of pathology. The NMR findings in six patients are illustrated. The results of the NMR scans are compared with the information that can be derived from conventional neuroradiologic procedures, including computed tomography. The value of the multiplanar facility of NMR is emphasized. It provides accurate volumetric information and establishes the precise topographical relationships of tumors to normal structures. The muscle cone and the optic nerve can be identified in the axial, coronal, and sagittal planes. Current limitations of the method and possible future developments to improve diagnostic precision are discussed.
Cranial Nerve Neoplasms↗
NMR tissue characterization in intracranial tumors: preliminary results.
Nuclear magnetic resonance (NMR) has been shown to have high sensitivity for detecting intracranial pathology. A study was devised to determine what information about tissue characteristics can be derived from steady-state free-precession NMR images alone and when compared with computed tomographic (CT) scans. The flow-dependent sequences allow diagnosis of intrinsic vascular lesions. Whereas precise characterization of some pathologic groups such as fat-containing tumors is possible, other important groups cannot be clearly differentiated. Preliminary findings suggest that it may be possible to predict the texture of extrinsic tumors from their NMR signals.
Brain Neoplasms↗
Extracerebral collections: recognition by NMR imaging.
After head injury, nuclear magnetic resonance (NMR) scanning is, like computed tomography (CT), an effective method of distinguishing between intracerebral and extracerebral lesions. The location and shape of extracerebral collections are excellently displayed using the multiplanar facility of NMR. There are good grounds for believing that the problem of the isodense subdural hematoma encountered in CT scanning can almost certainly be overcome by the use of NMR imaging.
Brain Concussion↗
NMR imaging in the recognition of giant intracranial aneurysms.
Most giant aneurysms present clinically as intracranial mass lesions. Many contain an organized lamellated thrombus with only a small eccentric lumen remaining that can be opacified at angiography. Four patients with such aneurysms were studied using flow-dependent nuclear magnetic resonance scanning sequences. The aneurysms show a smooth rounded margin, and the thrombus within is clearly distinguishable from the blood flowing through the patent lumen, which gives a low signal. By using different scan sequences it is possible to prove that the area of low signal is indeed fluid in rapid motion, thus confirming the diagnosis.
Calcinosis↗
NMR imaging in the diagnosis and management of intracranial angiomas.
Fourteen intracranial angiomas were clearly visualized and diagnosed with certainty on fast saturation-recovery images, which highlight blood vessels without the use of contrast media, and on steady-state free-precession images, in which the moving blood leads to removal of signal. Performed as the initial investigation, nuclear magnetic resonance obviates angiography when the site and extent of the angioma would preclude operation, and in other cases provides useful anatomic information complementing the angiogram. When clinical presentation follows hemorrhage the size and position of the associated hematoma can be reliably assessed.
Brain Neoplasms↗