Stereoscopic technique in digital subtraction angiography.

Takahashi, M; Bussaka, H.; Miyawaki, Masayuki; Higashida, Y.

doi:10.1148/radiology.157.2.3901115

Cited by 6 publications

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“…In terms of depth separation and proportion of good stereo observers, our results are similar to those obtained by Doi [4] and Takahashi et al [5]. In the conditions of our experiment, depth resolution of the system is at least equal to 1.5 mm.…”

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confidence: 91%

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IntroductionStereoscopic angiography provides a useful and efficient means of overcoming the problem of depth separation and object overlapping on a single projection of a three-dimensional object [1][2][3][4][5][6]. Several studies have pointed out the great advantage of this technique in clinical condition, as vascular neighboring of a lesion can be three dimensionally assessed and vessels overlapping discriminated [7][8][9][10][11][12][13][14][15].

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confidence: 99%

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Depth separation in ten observers with a new stereoscopic X-ray acquisition system

et al. 1997

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The aim of this work was to assess the depth separation of a new X-ray digital stereo angiographic system through visualization on a stereoscopic monitor. Before starting the clinical trial of this new stereo-digital angiographic system, it seemed to us mandatory to assess the inherent performance of the system to depict depth information, as well as the ability of the users to work with it. With this idea we designed a global test based on the observation of a physical test object by the potential users of the system, during a session long enough to simulate an angiographic study. The acquisition system consisted of a twin focal-spot X-ray tube and a standard DSA DG 300 (General Electric/CGR). The stereo display was controlled by a liquid crystal modulator placed in front of a black-and-white monitor. Special polarized glasses worn by the observers allowed right- and left-image separation. Depth separation was measured in ten observers by means of a stereoscopic test object. Six of the ten observers were able to locate accurately three-dimensional patterns separated by a 12- to 1.5-mm gap. No learning effect was noticed. This result suggested that stereo display through wireless polarized glasses coupled to up-to-date digital subtraction angiography technology may provide an accurate and ergonomic way to a dimensional enhancement of X-ray angiography.

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confidence: 91%

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confidence: 99%