Equilibrium (Gated) radionuclide ventriculography

Adam, W. E.; Tarkowska, A; Bitter, F.; Stauch, M; Geffers, H.

doi:10.1007/bf02552061

Cited by 151 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A composite sequence of N gamma camera images of the contents of the cardiac chambers, uniformly spaced over the average duration of a single cardiac cycle, is assembled by combining the image data from a large number of actual cardiac cycles. Image counts are binned into the N images on the basis of the electrocardiographic R-wave, causing each of the N image frames to represent the cardiac blood pool at a specific time in a single effective cardiac cycle (Adam et al 1979). Each pixel in the image sequence thus corresponds to a one-dimensional time course of count rate versus frame number over this cycle.…”

Section: Introductionmentioning

confidence: 99%

Sensing Characteristics of Ruthenium Films Fabricated by Radio Frequency Sputtering

Chou

Liu

Chen

2005

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

The use of Fourier analysis in nuclear medicine gated blood pool ventriculography provides a useful example of the application of Fourier methods to digital medical imaging. In particular, the nuclear medicine experience demonstrates that there is diagnostic significance not only in the pixel averages of temporal Fourier magnitude and phase computed in various image regions, but also in the distributions of the individual pixel values about those averages. However, a region containing pixels that are perfectly synchronous on average would still yield a finite distribution of calculated Fourer coefficients due to the propagation of stochastic pixel noise into the calculated values. We have studied this noise component of both the magnitude and phase distributions using phantom studies and computer simulation. In both approaches, several thousand one-pixel 'ventriculograms' were generated, all identical to each other except for stochastic noise. Fourier magnitudes and phases at several frequencies were calculated and histograms generated. A theoretical prediction of the distributions was developed and shown to fit the experimental results well. Our formalism can be used to estimate study count requirements or, for fixed study counts, to assess the stochastic noise contribution in the interpretation of measured phase and magnitude distributions.

show abstract

Section: Introductionmentioning

confidence: 99%

Sensing Characteristics of Ruthenium Films Fabricated by Radio Frequency Sputtering

Chou

Liu

Chen

2005

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Parametric images were introduced first by Adam and Geffers [14,15] generating maps of several hemodynamic parameters of a heart. Parametric images are still considered a standard addition to a radionuclide ventriculography.…”

Section: Discussionmentioning

confidence: 99%

Usefulness of clearance parametric images in detection of regional renal parenchyma dysfunction

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The data were collected as an R-wave synchronised multigated study in zoom mode, using a Digital Equipment Gamma 11 System, and then transferred and processed by a General Electric Star System (20). LVEF (8,21) and phase analysis (10,22) were determined at rest. The region of interest and the centre of the left ventricle were identified automatically by the computer.…”

Section: Rna (Radionuclide Angiocardiography)mentioning

confidence: 99%

Radionuclide Angiocardiography in Post‐myocardial Infarction Patients

Juul‐Möller

Lilja

Svensson

1988

Journal of Internal Medicine

View full text Add to dashboard Cite

One hundred and one representative post‐myocardial infarction (MI) patients were investigated with radionuclide angiocardiography (RNA) and exercise test within 1 month of the MI and after 6 and 12 months. From the RNA were calculated the left ventricular ejection fraction (LVEF) and a quantified phase image, the phase standard deviation (phase‐SD), representing the timing of the left ventricular contraction. The mean phase‐SD was significantly higher among these patients (18°, 19° and 18°, respectively, at the three investigations) compared to phase‐SD in normals (6°), indicating an impaired timing of the left ventricular (LV) contraction. At all three investigations a significant correlation was found between the phase‐SD and the LVEF (r=0.58, r=‐0.74 and r=‐0.75, respectively) and the corrected QT interval (r=0.27, r=0.44 and r=0.39, respectively). Maximal serum ASAT in patients with their first MI correlated significantly to phase‐SD. Low exercise capacity or unfavourable NYHA classification was associated with high phase‐SD. Phase‐SD higher than mean was also associated with significantly increased mortality during the follow‐up year (P=0.0057). In conclusion, phase‐SD, reflecting the timing of the LV contraction wave, is easily accessible and clinically relevant. It merits further investigation as a prognostic factor after an MI.

show abstract

Equilibrium (Gated) radionuclide ventriculography

Cited by 151 publications

References 33 publications

Sensing Characteristics of Ruthenium Films Fabricated by Radio Frequency Sputtering

Sensing Characteristics of Ruthenium Films Fabricated by Radio Frequency Sputtering

Usefulness of clearance parametric images in detection of regional renal parenchyma dysfunction

Radionuclide Angiocardiography in Post‐myocardial Infarction Patients

Contact Info

Product

Resources

About