Biomagnetic measurement apparatus

Details Biomagnetic measurement apparatus Biomagnetic measurement apparatus

2008-04-22

2008-04-22

Smith, Ruth S. (Department: 3737)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

C382S128000, C324S244000

Reexamination Certificate

active

07363070

ABSTRACT:
Disclosed herein is a biomagnetic measurement apparatus capable of visualizing cardiac electrical current distributions with information on the cardiac morphology of a subject. A magnetic field component in the z direction, vertical to the chest surface of a subject, is measured from two directions, front and back of the chest, and then to calculate the current distributions in the two directions and the distributions of the amplitudes of those current distributions. A three-dimensional standard heart model is created from average data on the cardiac morphology obtained from plural healthy subjects. An optimal position of the model is determined using the coordinates of the sinus node and the coordinates of the left ventricle. Then, a weight coefficient is obtained by front and back current distributions and front and back the distributions of the amplitudes of those current distributions on a set boundary of the model.

REFERENCES:
patent: 4977866 (1990-12-01), Wilkins
patent: 5285385 (1994-02-01), Igarashi et al.
patent: 5408178 (1995-04-01), Wikswo et al.
patent: 5495849 (1996-03-01), Hayashi et al.
patent: 5594849 (1997-01-01), Kuc et al.
patent: 6187032 (2001-02-01), Ohyu et al.
patent: 6374131 (2002-04-01), Tomita et al.
patent: 6522908 (2003-02-01), Miyashita et al.
patent: 6941165 (2005-09-01), Nakai et al.
patent: 2003/0063088 (2003-04-01), Machida et al.
H. Hosaka, “Visual determination of generators of the magnetocardiogram”, J. ELECTROCARDIOL., vol. 9, 1976, pp. 426-432.
T. Miyashita et al, “Construction of tangential vectors from normal cardiac magnetic field components”, Proc. 20th Int. Conf. IEEE/EMBS (Hong Kong), 1998, pp. 520-523.
K. Tsukada et al, “Noninvasive visualization of multiple simultaneously activated regions on torso magnetocardiographic maps during ventricular depolarization”, J. Electrocardiol., vol. 32, No. 4, 1999, pp. 305-313.
Y. Yamada et al, “Noninvasive diagnosis of arrythymic foci by using magnetocardiogram-method and accuracy of magneto-anatomical mapping system”, Journal Arrhythmia, vol. 16, No. 5, 2000, pp. 580-586.
A. Kandori et al, “A method for detecting myocardial abnormality by using a current-ratio map calculated from an exercise-induced magentocardiogram”, Med. Biol. Eng., Comp., vol. 39, 2001, pp. 29-34.
K. Ogata et al, “Visualization method of current distribution in cardiac muscle using a heart model, Transactions of the Japanese Society for Medical and Biological Engineering”, vol. 41, No. 1, 2003, pp. 25-33.

Affiliated with

Also associated with

Rating

Biomagnetic measurement apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Biomagnetic measurement apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Biomagnetic measurement apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2745224