Mobius3D MobiusFX DoseLab TG-142 / DoseLab Pro MedPhys Files
MedPhys Files
   Login or Register
HomeDownloadsRegister
Downloads › ImageJ macro to calculate CT helical slice thickness - new version
Toggle Content Main Menu
 Home Members options Search
Toggle Content User Info

Welcome Anonymous

Nickname
Password

Membership:
Latest: chand
New Today: 0
New Yesterday: 0
Overall: 1009

People Online:
Members: 0
Visitors: 67
Total: 67
Who Is Where:
 Visitors:
01: Home
02: Downloads
03: External downloads
04: Downloads
05: External downloads
06: Downloads
07: Downloads
08: Home
09: Downloads
10: Home
11: Downloads
12: Home
13: External downloads
14: Downloads
15: Downloads
16: Downloads
17: Downloads
18: External downloads
19: Downloads
20: External downloads
21: Downloads
22: Downloads
23: Downloads
24: Downloads
25: Downloads
26: External downloads
27: Home
28: External downloads
29: Downloads
30: Home
31: Downloads
32: Downloads
33: Downloads
34: Downloads
35: Downloads
36: Downloads
37: Downloads
38: External downloads
39: External downloads
40: Home
41: Downloads
42: External downloads
43: External downloads
44: Downloads
45: Downloads
46: Downloads
47: Downloads
48: Downloads
49: Downloads
50: External downloads
51: Downloads
52: Downloads
53: Downloads
54: Home
55: Home
56: Downloads
57: Home
58: Downloads
59: Downloads
60: Downloads
61: External downloads
62: External downloads
63: Downloads
64: Home
65: External downloads
66: Downloads
67: External downloads

Staff Online:

No staff members are online!
ImageJ macro to calculate CT helical slice thickness - new version
Main | Details | Download Now | History | Statistics

Add your mirror to this download

Category Diagnostic Imaging
Submitted by dplatten
Author's Name
David Platten
Distributed with custom license file? No
Published
Mon May 20, 2013 12:03 pm

An ImageJ macro to calculate the helical slice thickness from a CT scan along a rod containing a thin gold disc. The method is based on that used by ImPACT. Note: this macro may not work correctly on a bead embedded in a large phantom.

Expects a directory of DICOM images from a helical scan run through a thin metal disc or a very small metal bead. The reconstruction interval should be around 1/10 of the slice thickness. For example, if the reconstructed slice thickness is 3 mm then you need to set the reconstruction interval to 0.3 mm.

The phantom can be a thin gold disc embedded in a Perspex rod, similar to the one that ImPACT uses. Alternatively the method may work by scanning through a small metal bead, provided that the bead is much smaller than the reconstructed slice thickness. However, the routine may fail with this type of test object as it tries to locate the centre of the test object using a centre-of-mass calculation; this may result in the incorrect positioning of the ROI if the test object occupies the whole image.

For each image in the series the centre of mass of pixels that have a value of >= max / 2 is calculated. A circular ROI is then centred at this position and the mean pixel value calculated. The z-position of the image is recorded. Once all images have been examined, the background is subtracted from every point (actually the minimum mean ROI value), and then the values are normaised to the maximum value. The full-width at half-maximum of the profile is then calculated.

There can be ".txt", ".csv" or "dcminf" files in the directory with your images, but nothing else. Any other file in the directory will cause the routine to fail.


Member reviews

Review #16: Average by darrendemers12 on Thu Aug 13, 2015 8:00 am


ImageJ macro to calculate CT helical slice thickne

The phantom can be a thin gold disc embedded in a Perspex rod, similar to the one that ImPACT uses. Alternatively the method may work by scanning through a small metal bead, provided that the bead is much smaller than the reconstructed slice thickness. However, the routine may fail with this type of test object as it tries to locate the centre of the test object using a centre-of-mass calculation; this may result in the incorrect positioning of the ROI if the test object occupies the whole image.
Get-Your-Nj-Expired-Home-Sold , Homes-For-Sale-In-Springfield , Home-Comob , Home-Nrg , The-Paris-Law-Firm , Paris-Law-Firm , Seza-Law , Derek-Lawless , Explode-Your-Law-Practice
Rating Average
Popularity 1/5: Not popular
Downloads 186
Page views 6340

Download Now
Unless otherwise specified, all files are distributed under the MIT open source license for research and educational use only with no fitness guarantee.
Interactive software released under GNU GPL, Code Credits, Privacy Policy