John A. Correia

The principal axes transformation--a method for image registration.

Nathaniel M. Alpert, Jason Bradshaw, David N. Kennedy et al. · PubMed · 1990 · 282 citations

Image Reconstruction, Engineering, Image Analysis +22

Whole blood viscosity parameters and cerebral blood flow.

James C. Grotta, Robert H. Ackerman, John A. Correia et al. · Stroke · 1982 · 252 citations · Full text

Normal Controls, Social Sciences, Neurovascular Disease +17

Strategy for the Measurement of Regional Cerebral Blood Flow Using Short-Lived Tracers and Emission Tomography

Nathaniel M. Alpert, Lars I. Eriksson, JC Chang et al. · Journal of Cerebral Blood Flow & Metabolism · 1984 · 178 citations

Cerebral blood flow and cerebrovascular CO ₂ reactivity in stroke‐age normal controls

Stephen M. Davis, Robert H. Ackerman, John A. Correia et al. · Neurology · 1983 · 161 citations

Estimation of the Local Statistical Noise in Emission Computed Tomography

Nathaniel M. Alpert, David A. Chesler, John A. Correia et al. · IEEE Transactions on Medical Imaging · 1982 · 110 citations

Computed Tomography, Image Reconstruction, Engineering +18