Jian K Lin

US Patent:

6340887, Jan 22, 2002

Filed:

Sep 21, 1999

Appl. No.:

09/400228

Inventors:

Kecheng Liu - Solon OH
Jian Lin - Solon OH
Paul M. Margosian - Lakewood OH

Assignee:

Picker International Inc. - Highland Heights OH

International Classification:

G01V 300

US Classification:

324309, 324306

Abstract:

A black blood magnetic resonance angiogram is produced by exciting dipoles ( ) and repeatedly inverting the resonance ( ,. . . ) to produce a series of magnetic resonance echoes ( ,. . . ). Early echoes (e. g. , ( ,. . . , 56 )) are more heavily proton density weighted than later echoes (e. g. , ( )) which are more heavily T2 weighted. The magnetic resonance echoes are received and demodulated ( ) into a series of data lines. The data lines are sorted ( ) between the more heavily proton density weighted data lines and T2 weighted data lines which are reconstructed into a proton density weighted image representation and a T2 weighted image representation. The proton density weighted and T2 weighted image representations are combined ( ) to emphasize the black blood from the T2 weighted images and the static tissue from the proton density weighted image. The combined image is a black blood magnetic resonance angiogram. The production of the angiogram is time efficient and displays enhanced vessel depiction.

US Patent:

6397096, May 28, 2002

Filed:

Mar 31, 2000

Appl. No.:

09/540341

Inventors:

Kecheng Liu - Solon OH
Paul M. Margosian - Lakewood OH
Jian Lin - Solon OH

Assignee:

Philips Medical Systems (Cleveland) Inc. - Highland Heights OH

International Classification:

A61B 5055

US Classification:

600419, 382130, 324307, 324309

Abstract:

A black blood magnetic resonance angiogram is produced by exciting dipoles ( ) and repeatedly inverting the resonance ( ,. . . ) to produce a series of magnetic resonance echoes ( ,. . . ). Early echoes (e. g. , ( )) are more heavily proton density weighted than later echoes (e. g. , ( )), which are more heavily T weighted. The magnetic resonance echoes are received and demodulated ( ) into a series of data lines. The data lines are sorted ( ) between the more heavily proton density weighted data lines and T weighted data lines which are reconstructed into a proton density weighted image representation and a T weighted image representation. The proton density weighted and T weighted image representations are combined ( ) to emphasize the black blood from the T weighted images and the static tissue from the proton density weighted image. The combination processor ( ) scales ( ) the PDW and T W images to a common maximum intensity level. The PDW and T W image representations are then combined, e. g.