The Roentgen Densitometer A Novel Device For Pediatric Cardiology

Peter E. Engler; Paul J. Maluso; Rudolph S. Wagner; Louis R. M. Del Guercio; Farzin Davachi; Joseph D. Cohn

doi:10.1117/12.954622

25 March 1976 The Roentgen Densitometer A Novel Device For Pediatric Cardiology

Peter E. Engler, Paul J. Maluso, Rudolph S. Wagner, Louis R. M. Del Guercio, Farzin Davachi, Joseph D. Cohn

Proceedings Volume 0070, Application of Optical Instrumentation in Medicine IV; (1976) https://doi.org/10.1117/12.954622
Event: Application of Optical Instrumentation in Medicine, IV, 1975, Atlanta, United States

Abstract

The Roentgen densitometer comprises a conventional x-ray head and a compact cluster of six solid-state x-ray detectors in the place of conventional x-ray film. Each detector is connected via suitable amplifiers to one channel of a six-channel pen recorder. An infant or child is placed over the detectors such that the cardiac silhouette shadows the cluster, and a bolus of radio-opaque dye is injected into the external jugular vein. The dye coursing through the cardiopulmonary system modulates the intensity of X-radiation impinging upon the detectors thereby producing six simultaneous high-resolution densitometer curves from within the cardiac chambers. The curves are analyzed through a least mean square fit digitized program for abnormal hemodynamics resulting from intracardiac shunting and T, the exponential time constant, and the time to peak is computed for each curve. Analysis of these two parameters allows classification of the patients into four clinically distinguishable categories; right-to-left intracardiac shunt, left-to-right intracardiac shunt, bidirectional shunting,.and normal cardiac circulation. By this simple, inexpensive and relatively non-invasive means, congenital heart defects can be detected without resorting to cardiac catheterization procedures.

Citation Download Citation

Peter E. Engler, Paul J. Maluso, Rudolph S. Wagner, Louis R. M. Del Guercio, Farzin Davachi, and Joseph D. Cohn "The Roentgen Densitometer A Novel Device For Pediatric Cardiology", Proc. SPIE 0070, Application of Optical Instrumentation in Medicine IV, (25 March 1976); https://doi.org/10.1117/12.954622

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Heart

Sensors

Densitometry

X-ray detectors

Blood

Cardiac catheterization

Medicine

Show All Keywords

Keywords/Phrases

Search In:

Publication Years