LectureVR v2.1.1 - Released: 12 October 2009 
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Installation notes ------------------ 

Run setup program and follow on screen instructions 

Changes since ProjectionVR V2.1.0 --------------------------------- 

Update build environment to Windows SDK for Windows 7, DirectX SDK 
Sugust 2009. This does not alter the functionality of the software. 

Correct initialization problem that affected ATI Radeon HD 2400 GPUs. 
Symptoms were either excesively long initailization times or system 
hanging. 


LectureVR v2.1.0 - Released: 12 February 2009 
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Installation notes ------------------ 

Run setup program and follow on screen instructions 

Changes since ProjectionVR V2.0.0 --------------------------------- 

ability to angle the plane of the image receptor with respect to the 
central ray to demonstrate geometric distortions

LectureVR v2.0.0 - Released: 07 Dec 2008 
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The Lecture's demo tool has been separated from the ProjectionVR module 
and has been enhanced to form a module in its own right. This module is 
known as LectureVR. 

Installation notes ------------------ 

none 

Changes since ProjectionVR V3.1.9 --------------------------------- 

A selection of six regions of the body are available for selection. 
These include Head, Cervical Spine, Shoulder, Lumbar Spine, Pelvis and 
Knee. 

Hotkey "P" cycles through the available regions of interest. 

Hotkey "T" resets the orientation of the selected region of interest. 

Three levels of resolution are available for the generated image, low - 
256 by 256 px, medium - 512 by 512, and high 1024 by 1024. These can be 
selected by the user at runtime to balance image quality and performance 
based on the users hardware capabilities. 

The "HQ" option has been removed. 

The "Beam Energy" setting has been improved 

The function of the key pairs "I"+"K", "U"+"O" and "J","L" has been 
altered. Previously these keys moved (or translated) the subject in the 
world space. With V2 these keys move the centre-of-interest of the 
subject with respect to itself. The centre is maintained in the line of 
the "central ray", which is always in the centre of the field-of-view, 
so the subject will appear to move. However the significance of this 
change is most noticeable when the subject is rotated, as it will rotate 
around its centre-of-interest. Also SID and OID measurements are taken 
from this point.