The most beautiful images of Endoscopic Ultrasound(EUS), transesophageal 2-D echocardiography (TEE) and transthoracic 2-D echocardiography 


The most beautiful images of Endoscopic Ultrasound (EUS) and transesophageal 2-D echocardiography (TEE) in the images which were recorded before 1979.  Before 1979 there were no EUS systems and 2-D TEE systems in the world except Hisanaga's systems.  Hisanaga developed 2-D TEE system (1977) and EUS system (1978).  Hisanaga performed human examinations (EUS,TEE) using these systems immediately.  In addition Hisanaga reported filling stomach with water method during EUS examination in 1980.  Next images are the most beautiful images of TEE and EUS which were recorded before 1979.

See "Hisanaga's scientific contributions No.16".   Click here

Please read "Time line of development of endoscopic ultrasound and transesophageal echocardiography".   Click here

Please read "History of Echocardiography".     Click here

Pease read "History  of Transesophageal Echocardiography".     Click here

Please read "History of Endoscopic Ultrasonography".     Click here



Transesophageal cross-sectional echocardiograms in a patient with mitral stenosis.  The cross section is horizontal and shows the heart as viewed from the cardiac apex.  A : a frame during diastole and B : a frame during systole.  A stenotic mitral orifice(in A) is seen between the tips of the thickened mitral leaflets.  The interatrial septum (IAS) is seen without dropout.   AML = anterior mitral leaflet.  ESO = esophagus, IVS = interventricular septum, LA = left atrium, LV = left ventricle, PML = posterior mitral leaflet, RA = right atrium, RV = right ventricle, TV = tricuspid valve.

See Hisanaga's scientific contributions No.25.


Trans esophageal vertical linear scan through the pulmonary artery in a normal subject. Bifurcation of pulmonary artery and part of ascending aorta are seen.          AO = aorta, PA = pulmonary artery , BI = bifurcation of pulmonary artery.   

See Hisanaga's scientific contributions No.24.


Transesophageal two-dimensional echocardiogram in a patient with both aortic regurgitation and mitral stenosis.  LCA = left coronary artery, RCA = right  coronary artery.    

See Hisanaga's scientific contributions No.28.


Transesophageal two-dimensional echocardiogram in a patient with a left atrial myxoma.   Cross section is horizontal.  A stalk of the tumor is seen clearly.    K = stalk.  

Extracted tumor.  Weight of the tumor was 38.5g.

See Hisanaga's scientific contributions No.27.


Transesophageal two-dimensional echocardiogram in a patient with an ostium secundum atrial septal defect.  Cross-section is horizontal.     D - defect.         

See Hisanaga's scientific contributions No.26.


     Left                                               Right

Horizontal scans through left kidney in normal adult with intragastric high speed rotating scanner.  

Left : Left kidney and abdominal aorta are seen clearly.  If amplitude of near field is relatively low, pancreas is seen as anehoic  

space near stomach wall.       Right : With increasing amplitude of near field, pancreas assumes cloudlike shape.  

See Hisanaga's scientific contributions No.21.

7. Beautiful transthoracic 2D echocardiograms.  Next images are not the most beautiful images but only beautiful images because these are not transesophageal images, before 1979 there were many transthoracic sector scanners in the world.

Transthoracic long axis scan in a 31 years old normal man.  Entire heart image is seen.  The endocardium of the left ventricle and the right ventricular anterior wall are seen.  

Transthoracic 2D images.  Paired short axis and long axis scans in a 26-year-old normal woman.  The trabeculae carneae(or pectinate muscles) of the left ventricle are seen in detail.  The entire right ventricle and the tricuspid valve are seen in short axis.

These images are cited from next paper.

Hisanaga K, Hisanaga A.   A new real-time sector scanning system of ultra-wide angle and real-time recording of entire adult cardiac images --Transesophagus and Trans- chest- wall methods --.      In:White DN, Lyons AE, eds. Ultrasound in Medicine Vol.4, New York; Plenum Press, pp391-402, 1978