Summary: display Used either transrectally or transvaginally It was capable of producing some meaningful pictures of the pelvic organs A list of the early paper can be found at Hisaya Takeuchi Kazuo Maeda at the Tottori University in Toyko worked with doppler fetal heart rate recording since the late 1960s and developed various devices for fetal cardiotocography In collaboration
Image Dimensions: 159 x 216
Image originally found here.