Hi I'm a complete non programmer but willing to give it a try.
I have a DICOMDIR (medical imaging file) which has various tags in,
following a tag ie 0010, 0010 is the "patient name", "study date"
0008,0020 is another.
I have several DICOMDIR and I would like to extract just a few bits of
information from them to a .txt file, the files average size is about
343 KB as its full of other information as well which I don't need. Each
file has amongst other things a list of about 10 names, scan dates etc.
So far I've managed to read the file into an array using
although its a hex file it displays the contents in decimal, but they
correspond to the hex codes I've seen in a hex editor...
My problem is I don't know how to detect 0010,0010 ? then extract the
name. Can anyone help, I've looked all over the web but not finding
anything to help me much. Thanks a lot
Example:
byte = 0b00100010
# clear the trailing 4 bit, then shift:
first_four_bits = (byte & 0b11110000) >> 4
# clear the leading 4 bits:
last_four_bits = byte & 0b1111
btw., your code would be shorter as:
open('1DICOMDIR', 'rb') { |f|
contentsArray = f.each_byte.to_a
}
(also it's not so common to use camelCase in the ruby world, we usually
prefer under_scored_identifiers, butThatsUpToYou...)
By default ruby will print numbers as decimal, however you can look at
them in other ways by using to_s and passing in a base:
123.to_s(16) #=> "7b"
123.to_s(2) #=> "1111011"
hope this helps.
-- niklas
···
On Thu, 2011-02-24 at 06:28 +0900, rob s. wrote:
Hi I'm a complete non programmer but willing to give it a try.
I have a DICOMDIR (medical imaging file) which has various tags in,
following a tag ie 0010, 0010 is the "patient name", "study date"
0008,0020 is another.
I have several DICOMDIR and I would like to extract just a few bits of
information from them to a .txt file, the files average size is about
343 KB as its full of other information as well which I don't need. Each
file has amongst other things a list of about 10 names, scan dates etc.
So far I've managed to read the file into an array using
although its a hex file it displays the contents in decimal, but they
correspond to the hex codes I've seen in a hex editor...
My problem is I don't know how to detect 0010,0010 ? then extract the
name. Can anyone help, I've looked all over the web but not finding
anything to help me much. Thanks a lot
I don't usually work with binary files, but I would imagine you could do
something like this (untested):
search_byte = 0b00100010
contents = File.binread('1DICOMDIR').bytes.to_a
index = contents.index(search_byte)
# I assume you want the next entry after
name = contents[index.next]
Then simply decode the name however is appropriate.
David
···
On Wed, Feb 23, 2011 at 4:28 PM, rob s. <rsnotnats@gmail.com> wrote:
Hi I'm a complete non programmer but willing to give it a try.
I have a DICOMDIR (medical imaging file) which has various tags in,
following a tag ie 0010, 0010 is the "patient name", "study date"
0008,0020 is another.
I have several DICOMDIR and I would like to extract just a few bits of
information from them to a .txt file, the files average size is about
343 KB as its full of other information as well which I don't need. Each
file has amongst other things a list of about 10 names, scan dates etc.
So far I've managed to read the file into an array using
although its a hex file it displays the contents in decimal, but they
correspond to the hex codes I've seen in a hex editor...
My problem is I don't know how to detect 0010,0010 ? then extract the
name. Can anyone help, I've looked all over the web but not finding
anything to help me much. Thanks a lot
thanks for the replies looks like I don't have
contents = File.binread('1DICOMDIR').bytes.to_a
undefined method `binread' for File:Class
I have ruby 1.8.7
I'll have a play with the code you suggested tomorrow.
thanks for the replies looks like I don't have
contents = File.binread('1DICOMDIR').bytes.to_a
undefined method `binread' for File:Class
I have ruby 1.8.7
I'll have a play with the code you suggested tomorrow.