Measurement of Left Ventricular Cast Volume by Computed Tomography

Lipton, Martin J.; Hayashi, Thomas; Boyd, Douglas P.; Carlsson, Erik

doi:10.1148/127.2.419

Cited by 41 publications

(7 citation statements)

References 6 publications

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“…Lipton et al (1978) used CT In particular, use of the eomputer pnintout in this study, woul-d have been extremely bedious and time consuming, considering the number of subjects and sLices involved. Lipton et al (1978) The main eauses of artifacts in a CT scan are motion during the scan and large differences of attenuation values of adjacent tissues (Gonzalez et al, 1976 I97l-, 1975;Nahoum et al, 1972;Lowe, 1980) Other studies (Subtelny and Sakuda, 1964;Lowe, 1980) (Baker, 1981b to the anterior craniaf -Distance from gonion to sella 27 Ramus Ht. -Distance between the supenior aspect of the condyle (31) and gonion (Go,27 ) measured perpendicular to bhe anterior cnanial-base (SN, I-2).…”

mentioning

confidence: 99%

Computed tomographic measurement of tongue volume relative to its surrounding space

ROEHM¹

1982

American Journal of Orthodontics

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mentioning

confidence: 99%

Computed tomographic measurement of tongue volume relative to its surrounding space

ROEHM¹

1982

American Journal of Orthodontics

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“…This CT technique for determination of ventricular volumes has been validated previously (Lipton et al, 1978;Refsum et al, 1981;Ringertz et al, 1982). Because the distance from one scan level to the next was 1 cm, we added up the areas from the different scans and multiplied the sum by 1 cm to calculate the volume.…”

Section: Series Amentioning

confidence: 86%

Left and right ventricular diastolic function during acute pericardial tamponade

Smiseth

Frais

Junemann

et al. 1991

Clinical Physiology

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The aim of the study was to determine the effect of acute pericardial tamponade on left (LV) and right ventricular (RV) intracavitary and transmural pressure-volume (P-V) relations and to assess the effect of changing blood volume during tamponade on LV and RV volumes. The experiments were done in 11 acutely instrumented anaesthetized dogs in which LV and RV volumes were determined by computed tomography (CT) (n = 5) and LV and RV diameters by sonomicrometry (n = 6). Pressures were measured in the pericardium (balloon transducer), in the aorta and in the ventricles. Incremental pericardial infusion (up to 180 ml) caused a progressive left and upward shift of the LV and the RV intracavitary P-V relationship. This shift was entirely due to increased pericardial pressure (PP). The induction of tamponade caused no change in the LV and RV transmural P-V relationship. During tamponade with ventricular filling pressures above 10-15 mmHg, blood volume expansion caused only minimal increase in LV and RV volumes. In conclusion, pericardial tamponade shifted the LV and the RV intracavitary diastolic P-V relation by increasing PP. However, there was no change in the transmural P-V relationship, indicating unchanged myocardial compliance. Volume loading caused only minimal increase in LV and RV volumes during tamponade.

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“…Three-dimensional volume determination has obvious advantages compared with any two-dimensional approach, because the calculation of ventricular volumes by summing up the volumes of contiguous slices is completely independent of geometric assumptions [10,11]. The non-invasiveness and renunciation of radiation are evident advantages of MR imaging in comparison with scintigraphic methods [12], angiocardiography as the given gold standard [13], computed tomography [14], and 2D echo [15]. Ventricular volumetry using MRI also is superior to 3D echo in vitro for both ventricles [16].…”

Section: Discussionmentioning

confidence: 99%

Right and left ventricular volume measurements in an animal heart model in vitro: first experiences with cardiac MRI at 1.0 T

et al. 2000

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IntroductionMagnetic resonance imaging of the heart for measurements of right and left ventricular volumes is well validated at a field strength of 1.5 T [1, 2, 3], usually using extensive hardware equipment such as phased-array surface coils and gradient systems enabling high slew rates for minimizing image acquisition time. Different MR techniques have been tested such as spin-echo (SE) imaging and gradient cine MR imaging [4,5]. More recently, several authors compared ultrafast multishot or single-shot echo-planar imaging (EPI) to conventional gradient techniques of the heart, demonstrating markedly shorter acquisition times without significant loss of temporal and spatial resolution enabling adequate delineation of the endocardial borders comparable to gradient cine MRI, and permitting breath-hold imaging [6,7,8,9]. Ventricular volumes and ejection fractions are important measurements of cardiac function, e. g., for obtaining prognostic indicators in patients with different relevant cardiac diseases [4] and frequently used parameters central to the objective characterization of cardiac performance [7].The aim of this study was to enhance the capability of a commercially available software for the determination of right and left ventricular volume measurements using an animal heart model in vitro on a standard MR system at 1.0 T before applying this method in patients. To our knowledge, in most in vivo and in vitro studies, 1.5-T magnets as well as power gradients and special surface coils have been used in cardiac MR volumetry. A gradient EPI technique (multishot EPI) was used combining a short acquisition time and evaluable images of good quality. Materials and methods Heart modelsEight pig hearts were explanted and immediately perfused with cardiopelagic solution (Bretschneider solution) over the aortic root. The atria were removed followed by water-tight sew-up of the atrioventricular valves. Cannulas were fixed into the aorta and the pulmonary truncus. Coronary arteries were perfused with Abstract. The aim of this study was to determine the accuracy in quantifying right and left ventricular volumes using a 1.0-T system and commercially available, standard equipment. For exact comparison of MRI measurements and real volumes we used an animal heart model ex vivo. Eight pig hearts were explanted and prepared by removal of the atria. Aorta and pulmonary truncus were cannulated. Definable volumes were injected into the ventricles. Magnetic resonance imaging was performed at 1.0 T (Gyroscan T10 NT, Philips, Eindhoven, The Netherlands); sequence: fast field echo±echo planar (multishot EPI); body coil; MR software: Cardiac Application Package (Philips). Statistical analysis correlated the real volumes and MR measurements separately for both ventricles and two investigators (SAS, ANOVA). For both ventricles and both investigators the correlation between real volumes and MR measurements was greater than 0.99. There was no significant systematic false estimation for both ventricles. Magnetic resonance imaging at 1.0...

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Measurement of Left Ventricular Cast Volume by Computed Tomography

Cited by 41 publications

References 6 publications

Computed tomographic measurement of tongue volume relative to its surrounding space

Computed tomographic measurement of tongue volume relative to its surrounding space

Left and right ventricular diastolic function during acute pericardial tamponade

Right and left ventricular volume measurements in an animal heart model in vitro: first experiences with cardiac MRI at 1.0 T

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