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Dear All
We have a CA6000 machine for measuring spinal motion.
It actually measures skull relative to thorax or thorax to pelvis.
The output is a stream of co-ordinates x,y,z and three angles (as well as
velocity and acceleration data) in text format.
I have written a set of Excel macros to calculate from the sagittal plane
data (x,y and theta) the Instantaneous Centre Rotation. However this
involves a calculation that involves arctangent, which Excel handles badly.
Can anyone suggest an easy way to carry out these calculations?
Does anyone have standard routines already written for this?
Many thanks in advance
Edward
Euro Ing Edward Draper PhD BSc CEng MIMechE IPEM
Principal Clinical Bioengineer
Division of Surgery, Anaesthetics and Intensive Care
Imperial College School of Medicine
Tel: +44 (0) 181 746 8312 Fax: +44 (0) 181 746 8787
Mobile: 0385 785369 email: e.draper@ic.ac.uk
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We have a CA6000 machine for measuring spinal motion.
It actually measures skull relative to thorax or thorax to pelvis.
The output is a stream of co-ordinates x,y,z and three angles (as well as
velocity and acceleration data) in text format.
I have written a set of Excel macros to calculate from the sagittal plane
data (x,y and theta) the Instantaneous Centre Rotation. However this
involves a calculation that involves arctangent, which Excel handles badly.
Can anyone suggest an easy way to carry out these calculations?
Does anyone have standard routines already written for this?
Many thanks in advance
Edward
Euro Ing Edward Draper PhD BSc CEng MIMechE IPEM
Principal Clinical Bioengineer
Division of Surgery, Anaesthetics and Intensive Care
Imperial College School of Medicine
Tel: +44 (0) 181 746 8312 Fax: +44 (0) 181 746 8787
Mobile: 0385 785369 email: e.draper@ic.ac.uk
---------------------------------------------------------------
To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l
---------------------------------------------------------------