CARDIAC (Continued)



As an example, assume you have an image sequence that contains two views, 

call them 'A' and 'B'.  In each view there is a systole and diastole. We 

can, for instance, start with DIASTOLE A.  Press the 'DIASTOLE A' button and 

then go to the image, press the left mouse button, keep it depressed and draw 

the contour. If you would like to change the contour, press 'CHANGE' and then 

one of the image selection buttons, for instance 'DIASTOLE A', you will see 

the button caption changes to 'CHANGE DA'. Move the cursor to the first point 

on the contour you would like to replace, draw the new contour section and end 

up at the last contour point that you would like to replace. The contour will 

be revised and updated. Continue by pressing 'SYSTOLE A', enter the systole; 

'DIASTOLE B', draw in the diastole B; 'SYSTOLE B', draw in systole B. In this 

process, you are first selecting the proper frame as you move along.  After you 

are finished entering the contours you can press, 'CALIBRATE' to enter a reference 

quantity for converting relative volumes to cubic centimeters.  First move the 

calibrate window to the catheter and then adjust the circle to the size of the 

catheter.  The enter the French number of the catheter using the buttons marked 

for that purpose. The final step is to press the 'CALCULATE' button causing 

the various quantities to be calculated.  The results are presented separately 

for VIEWS A and B. Each of these assume that there is a cylindrical symmetry. 

To combine the information from VIEWS A and B a geometric mean calculation is 

used and those volumes presented at the bottom of the 'CARDIAC RESULTS' dialog 

box. The graphs that are presented are contraction fractions.   Because the 

vertical coordinate in MS-Windows systems is positive downward, the polar plots 

have the zero angle axis to the right and increase in angles going clockwise. 

To exit the 'CARDIAC' section, just like any other box in ImprocRAD  press the 

small 'X'  in the upper right hand corner of the dialog box. 



Once the registered images have been read, move to the 

'CARDIAC ANALYSIS' box. Do not close the 'CARDIAC READ' dialog box.  Some of 

the controls in that box are used by the program during the analysis phase. 

You can then display the cine-loop in motion by pressing 'LOOP'.  An 

individual frame can be selected by using the spinners in the edit box just 

to the right of 'FRAME' or by entering a number and then 

pressing 'FRAME' to select that frame. Once you have found the frame you want 

the next step is to outline the heart chambers. 



As an example, assume you have an image sequence that contains two views, 

call them 'A' and 'B'.  In each view there is a systole and diastole. We 

can, for instance, start with DIASTOLE A.  Press the 'DIASTOLE A' button and 

then go to the image, press the left mouse button, keep it depressed and draw 

the contour. If you would like to change the contour, press 'CHANGE' and then 

one of the image selection buttons, for instance 'DIASTOLE A', you will see 

the button caption changes to 'CHANGE DA'. Move the cursor to the first point 

on the contour you would like to replace, draw the new contour section and end 

up at the last contour point that you would like to replace. The contour will 

be revised and updated. Continue by pressing 'SYSTOLE A', enter the systole; 

'DIASTOLE B', draw in the diastole B; 'SYSTOLE B', draw in systole B. In this 

process, you are first selecting the proper frame as you move along.  After you 

are finished entering the contours you can press, 'CALIBRATE' to enter a reference 

quantity for converting relative volumes to cubic centimeters.  First move the 

calibrate window to the catheter and then adjust the circle to the size of the 

catheter.  The enter the French number of the catheter using the buttons marked 

for that purpose. The final step is to press the 'CALCULATE' button causing 

the various quantities to be calculated.  The results are presented separately 

for VIEWS A and B. Each of these assume that there is a cylindrical symmetry. 

To combine the information from VIEWS A and B a geometric mean calculation is 

used and those volumes presented at the bottom of the 'CARDIAC RESULTS' dialog 

box. The graphs that are presented are contraction fractions.   Because the 

vertical coordinate in MS-Windows systems is positive downward, the polar plots 

have the zero angle axis to the right and increase in angles going clockwise. 

To exit the 'CARDIAC' section, just like any other box in ImprocRAD  press the 

small 'X'  in the upper right hand corner of the dialog box. 



There are three buttons at the bottom of the 'Cardiac Read' dialog box 

that serve to manage patient information.  These buttons are 'Word', 'DB', 

and Excel'.  The 'Word' button launches the Microsoft Word '97 word processor 

and read the patient's document file.  The document file is stored in the 

patient's folder in the sub-folder 'Text'.  The file is named 'PatientInfo.doc'. 

The 'DB' button launches 

the Microsoft Access 97 database program and opens the patient database that is 

located in the 'Cardiac' folder.  The database contains information on several or 

all of the patients located in the 'Cardiac Folder'.  The 'Excel' button launches 

the Microsoft Excel 97 spreadsheet program.  Again, the spreadsheet contains 

data on several or all of the patients located in the 'Cardiac Folder'.



The 'Write Subsequence' group allows the selection of a sequence of images

from the loop to be written to files.  Initially, the first and last images

of the sequence are set to the frame being viewed.  This selection can be

changed using the corresponding edit controls.  Initially, the directory

to which the files will be written is set to the default write directory.

This selection can be changed by pressing the 'Directory' button and

selecting from any existing directory. Upon pressing the 'Write' button

the sequence of images are written to the selected directory.  The filenames

are CardiacOut<n>.bmp where , <n> ranges from the number of the first frame

to the number of the last frame.  For example, if the 25-th frame is written

out its filename is CardiacOut25.bmp.The images are written in the MS-Windows

bitmap or .bmp format.  The format consists of a 1078 byte header

followed by raw 8-bit data.



This help file was updated on February 28, 2001.