Three-dimensional phase-contrast MR angiography in the head and neck: preliminary report.

Pernicone, J R; Siebert, James E.; Potchen, E. James; Pera, Abraham; Dumoulin, Charles L.; Souza, S. P.

doi:10.2214/ajr.155.1.2112840

Cited by 51 publications

(29 citation statements)

References 2 publications

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“…1 " 13 The idea of a combined study has gained favor because it provides a noninvasive alternative for the complete study of patients with suspected cerebrovascular disease. Because of the relatively short time of acquisition, MRA sequences can be easify added to the traditional parenchymal study without significantly prolonging the overall examination time ( Figure 1).…”

Section: Magnetic Resonance Angiography Cerebrovascular Applicationsmentioning

confidence: 99%

Magnetic resonance angiography. Cerebrovascular applications.

Ruggieri

Masaryk

Ross

1992

Stroke

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Section: Magnetic Resonance Angiography Cerebrovascular Applicationsmentioning

confidence: 99%

Magnetic resonance angiography. Cerebrovascular applications.

Ruggieri

Masaryk

Ross

1992

Stroke

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“…In situ kidneys normally have a much larger respiratory excursion than pelvic transplanted ones, a motion that probably effectively prevents visualization of in situ intrarenal branches with 3D TOE The use of a Helmholz body b a The special MRA method used in the present investigation, 3D TOF, has certain advantages and disadvantages, some of which are well illustrated by our study. The main advantages of the method as compared to the three major alternative methods, sequential 2D TOF (5,8,12,14), se-quential2D phase contrast (5), and 3D phase contrast MRA (6,17,26), are the shorter acquisition time as compared to phase contrast MRA, and the higher spatial resolution as compared to sequential 2D methods.…”

Section: Resultsmentioning

confidence: 99%

“…The final role of MRA has not yet been established. The majority of investigations performed so far have studied the usefulness of MRA in diagnosing disease of the carotid arteries and intracranial vessels (4,11,(14)(15)(16)(17)(18)(19). Experience with MRA in renal artery disease is just being acquired, and reports published so far have been limited to in situ, i.e., nontransplanted, renal arteries (5,12,26).…”

mentioning

confidence: 99%

MR Angiography of in Situ and Transplanted Renal Arteries

Smith

Bakke

1993

Acta Radiol

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Three-dimensional (3D) time-of-flight (TOF) MR angiography (MRA) was performed in 34 patients with suspected renal artery disease. In situ (i.e., nontransplanted) renal arteries were studied with MRA in 14 patients. Of these, 12 had conventional angiography for comparison. Twenty-four MRAs of transplanted renal arteries were obtained in 20 patients; 8 of these had angiography as well. Significant stenoses of in situ renal arteries were diagnosed with a sensitivity of 100% and a specificity of 95%. The stenoses were all proximal; 3D TOF MRA proved inadequate for depiction of peripheral renal arteries. MRA and angiography showed good agreement between findings in 7 of 8 patients with renal transplants. In one patient with a renal transplant, MRA showed a significant stenosis of the arterial anastomosis which appeared completely normal at i.a. DSA, indicating that findings at MRA still need to be confirmed by more established alternative methods.

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“…Not only should a screening strategy preferably be non-invasive, but it should also be reliable and accurate. High resolution CT scanning lacks sensitivity for smaller aneurysms [19,27,30], magnetic resonance imaging and magnetic resonance angiography have not yet been evaluated properly [3,21,26], and both are expensive procedures.…”

Section: Introductionmentioning

confidence: 99%

Acoustic detection of intracranial aneurysms: A decision analysis

vanBruggen¹,

Dippel

Habbema

et al. 1996

Acta neurochir

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We present a further evaluation of an improved recording method for the acoustic detection of intracranial aneurysms (ADA). A sensor was applied to the patient's eyes. Two measures were derived to summarize the power spectral density function of the sound frequencies that were obtained from each patient: the power median (PM), the median of the power spectral density function, and the mean difference error (MDE), a measure of the difference between the normalized, logarithmically transformed spectra of the patient and a template, the normal spectrum. The capability of these two measures (alone or combined) to discriminate between patients with and without an intracranial aneurysm was tested in a series of 89 patients harbouring a total of 109 aneurysms and 73 controls, using multiple logistic regression analysis. When PM and MDE were combined, the accuracy of the predictions amounted to 79%. Individualized threshold values of the likelihood ratio of harbouring an aneurysm, for ordering four-vessel angiography are suggested, depending on the prior probability of harbouring an aneurysm, the risks of unnecessary angiography and the risk of living with an undetected aneurysm. Our decision analysis suggests that using these recommendations, employing acoustic detection results in a small gain in quality adjusted life expectancy (0.01 life year) for patients aged between 40 and 60, compared to no diagnostic testing, and 0.02 life year compared to angiography, which cannot be recommended. For patients with a three times increased prior risk of harbouring an intracranial aneurysm, the benefit of ADA compared to angiography increases to 0.05 life year. We conclude that acoustic detection has the potential of becoming a useful tool in the non-invasive diagnosis of occult, asymptomatic intracranial aneurysms.

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Three-dimensional phase-contrast MR angiography in the head and neck: preliminary report.

Cited by 51 publications

References 2 publications

Magnetic resonance angiography. Cerebrovascular applications.

Magnetic resonance angiography. Cerebrovascular applications.

MR Angiography of in Situ and Transplanted Renal Arteries

Acoustic detection of intracranial aneurysms: A decision analysis

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