From: Arthur W. Brooks
Sent: Monday, February 05, 2007 1:20 PM
To: Steve Raftopoulos; James H. Chrzanowski; Phil Heitzenroeder; Wayne
T. Reiersen; Thomas G. Brown
Subject: B1 Casting Measurements Comparison - Correction

Attachments: B1 Casting Meas MTM vs PPL r1.ppt

Folks,

The B1 comparison has been corrected to fix the same data mismatch error found with A4. Unfortunately, it has not improved things any.

Art

-----Original Message-----
From: Arthur W. Brooks 
Sent: Monday, February 05, 2007 12:05 PM
To: Steve Raftopoulos; James H. Chrzanowski; Phil Heitzenroeder; Wayne T. Reiersen; Thomas G. Brown
Subject: A4 Casting Measurements Comparison

Folks,

There was an error in the comparison made between the A4 casting measurements. The review of the actual coordinate data showed that the ordering of the Verisurf data was not as expected. As a result, septum measurements were being compared to base measurements. 

The MTM data and the PPL data (in particular, the Leica data) agree much better for A4. The corrected plots are attached.

A similar error may have occurred with B1 and is being investigated. However the magnitudes of the MTM and PPL data persist so this will not fully explain the discrepancy.

Art