Quick Question on VolumeTracings.csv

[LitMSCTBB]

Are there any formal papers on the definitions of X1, X2, Y1, Y2? I am not a cardiologist so I was not exactly sure what they represented. I've only seen them used in https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4694312/, so the lack of use of those values raised a doubt.

Also, in VolumeTracings.csv, assuming that X1, X2, Y1, Y2 are properties of the heart that would vary over the course of the video, why are there different values of those for the same frame in the dataset provided by Stanford? For example:
FileName,X1,Y1,X2,Y2,Frame
0X100009310A3BD7FC.avi,51.26041667,15.34895833,64.93229167,69.125,46
0X100009310A3BD7FC.avi,50.03761083,17.16784126,53.36722189,16.32132997,46

[douyang]

Coordinate system regarding where the annotation is on the 112x112 image in standard Cartesian coordinates (x,y). The set of parallel lines correspond to the segmentation label.

…

________________________________ From: Arnav Adhikari ***@***.***> Sent: Wednesday, December 21, 2022 7:41:19 PM To: echonet/dynamic ***@***.***> Cc: Subscribed ***@***.***> Subject: [echonet/dynamic] Quick Question on VolumeTracings.csv (Issue #73) Are there any formal papers on the definitions of X1, X2, Y1, Y2? I am not a cardiologist so I was not exactly sure what they represented. I've only seen them used in https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4694312/, so the lack of use of those values raised a doubt. Also, in VolumeTracings.csv, assuming that X1, X2, Y1, Y2 are properties of the heart that would vary over the course of the video, why are there different values of those for the same frame in the dataset provided by Stanford? For example: FileName,X1,Y1,X2,Y2,Frame 0X100009310A3BD7FC.avi,51.26041667,15.34895833,64.93229167,69.125,46 0X100009310A3BD7FC.avi,50.03761083,17.16784126,53.36722189,16.32132997,46 — Reply to this email directly, view it on GitHub<#73>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AABDDZ7JMVPEQCG4ZCI44LTWOPEV7ANCNFSM6AAAAAATGIZFDM>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[douyang]

The annotations from that reference do not seem to be the same imaging system and are not the same.

…

________________________________ From: David Ouyang ***@***.***> Sent: Wednesday, December 21, 2022 8:15:38 PM To: echonet/dynamic ***@***.***>; echonet/dynamic ***@***.***> Cc: Subscribed ***@***.***> Subject: Re: [echonet/dynamic] Quick Question on VolumeTracings.csv (Issue #73) Coordinate system regarding where the annotation is on the 112x112 image in standard Cartesian coordinates (x,y). The set of parallel lines correspond to the segmentation label.

________________________________ From: Arnav Adhikari ***@***.***> Sent: Wednesday, December 21, 2022 7:41:19 PM To: echonet/dynamic ***@***.***> Cc: Subscribed ***@***.***> Subject: [echonet/dynamic] Quick Question on VolumeTracings.csv (Issue #73) Are there any formal papers on the definitions of X1, X2, Y1, Y2? I am not a cardiologist so I was not exactly sure what they represented. I've only seen them used in https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4694312/, so the lack of use of those values raised a doubt. Also, in VolumeTracings.csv, assuming that X1, X2, Y1, Y2 are properties of the heart that would vary over the course of the video, why are there different values of those for the same frame in the dataset provided by Stanford? For example: FileName,X1,Y1,X2,Y2,Frame 0X100009310A3BD7FC.avi,51.26041667,15.34895833,64.93229167,69.125,46 0X100009310A3BD7FC.avi,50.03761083,17.16784126,53.36722189,16.32132997,46 — Reply to this email directly, view it on GitHub<#73>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AABDDZ7JMVPEQCG4ZCI44LTWOPEV7ANCNFSM6AAAAAATGIZFDM>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>