### Abstract

The authors carried out experimental and clinical studies of left ventricular volume measurement using equilibrium-gated blood pool scan. Using phantoms, we experimentally obtained a regression equation between radioisotope levels and camera counts. From this equation, we deduced a regression equation between camera counts and volumes, which was then used for calculation of left ventricular volumes using count technique. In an experiment using phantom with various volumes, we obtained a favorable result that the average absolute error between the true and measured volumes was as small as 6.8%. In 11 patients, we calculated the left ventricular volume and ejection fraction employing the regression equation and compared the calculated values with the values obtained by cinemascopy. This comparison disclosed an excellent correlation (r = 0.955 for end-diastolic volume, 0.997 for end-systolic volume and 0.853 for ejection fraction). Mean absolute error was 16.2% for end-diastolic volume and 16.0% for end-systolic volume. These results indicate that this technique is clinically applicable.

Original language | English |
---|---|

Pages (from-to) | 512-518 |

Number of pages | 7 |

Journal | Radioisotopes |

Volume | 36 |

Issue number | 10 |

Publication status | Published - Oct 1987 |

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### ASJC Scopus subject areas

- Radiation

### Cite this

*Radioisotopes*,

*36*(10), 512-518.

**Studies of left ventricular volume estimation from gated blood pool scan with the use of regression equations.** / Hiraki, Y.; Yanagi, H.; Nagaya, I.; Shimizu, M.; Joja, I.; Aono, K.

Research output: Contribution to journal › Article

*Radioisotopes*, vol. 36, no. 10, pp. 512-518.

}

TY - JOUR

T1 - Studies of left ventricular volume estimation from gated blood pool scan with the use of regression equations.

AU - Hiraki, Y.

AU - Yanagi, H.

AU - Nagaya, I.

AU - Shimizu, M.

AU - Joja, I.

AU - Aono, K.

PY - 1987/10

Y1 - 1987/10

N2 - The authors carried out experimental and clinical studies of left ventricular volume measurement using equilibrium-gated blood pool scan. Using phantoms, we experimentally obtained a regression equation between radioisotope levels and camera counts. From this equation, we deduced a regression equation between camera counts and volumes, which was then used for calculation of left ventricular volumes using count technique. In an experiment using phantom with various volumes, we obtained a favorable result that the average absolute error between the true and measured volumes was as small as 6.8%. In 11 patients, we calculated the left ventricular volume and ejection fraction employing the regression equation and compared the calculated values with the values obtained by cinemascopy. This comparison disclosed an excellent correlation (r = 0.955 for end-diastolic volume, 0.997 for end-systolic volume and 0.853 for ejection fraction). Mean absolute error was 16.2% for end-diastolic volume and 16.0% for end-systolic volume. These results indicate that this technique is clinically applicable.

AB - The authors carried out experimental and clinical studies of left ventricular volume measurement using equilibrium-gated blood pool scan. Using phantoms, we experimentally obtained a regression equation between radioisotope levels and camera counts. From this equation, we deduced a regression equation between camera counts and volumes, which was then used for calculation of left ventricular volumes using count technique. In an experiment using phantom with various volumes, we obtained a favorable result that the average absolute error between the true and measured volumes was as small as 6.8%. In 11 patients, we calculated the left ventricular volume and ejection fraction employing the regression equation and compared the calculated values with the values obtained by cinemascopy. This comparison disclosed an excellent correlation (r = 0.955 for end-diastolic volume, 0.997 for end-systolic volume and 0.853 for ejection fraction). Mean absolute error was 16.2% for end-diastolic volume and 16.0% for end-systolic volume. These results indicate that this technique is clinically applicable.

UR - http://www.scopus.com/inward/record.url?scp=0023432478&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0023432478&partnerID=8YFLogxK

M3 - Article

VL - 36

SP - 512

EP - 518

JO - Radioisotopes

JF - Radioisotopes

SN - 0033-8303

IS - 10

ER -