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About the atlas

Creating the atlas

All procedures including echocardiography, electrocardiography and Magnetic Resonace Imaging were approved by the appropriate institutional ethics committees and informed consent was obtained from the patient prior to any examination.

The atlas is based on a MRI scan consisting of multiple contiguous images or slices from 5 different imaging planes of a normal patient. The scanning was performed at the Centre of Advanced MRI in the University of Auckland using a Siemen's Avanto scanner.

At the scanner these images are acquired in a standard format called DICOM (Digital Imaging and Communications in Medicine). This format is able to maintain the image's full resolution and also allows interoperability between different imaging modalities and information systems. However, DICOM images are too large to be displayed effectively on the web therefore each image has been converted into a compressed jpeg image format. Each slice subsequently had all the anatomical features labelled by a registered radiologist.

The Atlas's images

First time users should read the brief Atlas guide to learn how to zoom, pan, adjust brightness/contrast and cycle through the slices in each image plane before entering the Cardiac Atlas. The different images used in the atlas are as follows

Anatomical imaging planes

Images orientated to the body's anatomical axis

Axial
Image slices that are perpendicular to the long axis of the body
Coronal
Image slice that bisects the back and front sides of the body
Sagittal
Image slice that bisects the left and right sides of the body
An image which demonstrates planes of orientation at which the MRI scans were taken through the body.

© 2006 Auckland Bioengineering Institute.

Cardiac specific imaging planes

Images orientated to the heart's anatomical axis

Long
Longitudinal images that rotate about the Left Venticle longitudinal axis
Short
Image slice that is transverse to the Left Ventricle' s longitudinal axis
An image which demonstrates planes of orientation at which the MRI scans were taken through the heart.

© 2006 Auckland Bioengineering Institute.

Other Images and Cines

In addition to the 5 imaging planes used in the original atlas. We have acquired two additional planes of the right ventricular outflow tract and images of the aortic arch.

Cines are series of images that are acquired at different time points in the cardiac cycle. These images are then compiled into a movie and can be used to study the motion of the heart walls or blood flow during the heart cycle.

We have captured the heart wall motion using two types of pulse sequences one produces conventional magnitude images and the other produces tagged images which can show more complex motion patterns.

Lastly we have also acquired a cine showing the blood flow through the aorta using a phase contrast pulse sequence.

Additional information

Additional information is available for the following topics:

Download JPEG copies of the original DICOM images.