comp.lang.idl-pvwave archive: archive » Re: Reading Multiple DICOM Files

Home » Public Forums » archive » Re: Reading Multiple DICOM Files

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Reading Multiple DICOM Files [message #65550 is a reply to message #65549]

Mon, 09 March 2009 11:07

rtk
Messages: 22
Registered: September 2008

Junior Member

On Mar 8, 6:17 pm, Jye <jye.sm...@gmail.com> wrote:
> if i eq 0 then All_Images = image_slice else All_Images =
> [[[All_Images]], [[image_slice]]]

Forget too much Java, which, I agree, is a bad thing. I'd say you
have been doing too much Matlab programming. The vast majority of
your problem lies with the line above. If I run this code on my box:

pro ttt0
s = systime(1)
for i=0,899 do begin
im = fix(dist(256))
if (i eq 0) then begin
all = im
endif else begin
all = [[[all]], [[im]]]
endelse
endfor
print, 'runtime = ', systime(1)-s
help, all
end

It takes 93 seconds. However, if I run this code:

pro ttt2
all = intarr(256,256,900)
s = systime(1)
for i=0,899 do begin
im = fix(dist(256))
all[*,*,i] = im
endfor
print, 'runtime = ', systime(1)-s
help, all
end

it takes 1.6 seconds. The only difference is that the output array is
allocated once, instead of 900 times with 899 ever-increasing array
copies to boot. Since you know the number of file in advance,
allocate All_Images and just assign into it.

Ron

Report message to a moderator

[Message index]

		Re: Reading Multiple DICOM Files By: Foldy Lajos on Tue, 10 March 2009 04:56
		Re: Reading Multiple DICOM Files By: Jye on Mon, 09 March 2009 15:53
		Re: Reading Multiple DICOM Files By: rtk on Mon, 09 March 2009 11:07
		Re: Reading Multiple DICOM Files By: Robbie on Sun, 08 March 2009 20:11
		Re: Reading Multiple DICOM Files By: David Fanning on Sun, 08 March 2009 17:21
		Re: Reading Multiple DICOM Files By: Jye on Sun, 08 March 2009 17:17
		Re: Reading Multiple DICOM Files By: Robbie on Sun, 08 March 2009 16:42
		Re: Reading Multiple DICOM Files By: David Fanning on Sun, 08 March 2009 16:39
		Re: Reading Multiple DICOM Files By: Tibor47 on Mon, 23 March 2009 10:26

Previous Topic:	Re: Changing color of composite objects
Next Topic:	Re: starting point of dashed lines

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 19:19:42 PDT 2025

Total time taken to generate the page: 0.00406 seconds