The experimental procedure was explained, and all investigators left the imaging room. The volunteers were shown the equipment in the two rooms, and personal and gynaecological histories were taken. With this fast acquisition technique, 11 slices of relatively good quality were obtained within 14 seconds. The echo time was 64 ms, with a repetition time of 4.4 ms. After a preview, 10 mm thick sagittal images were taken with a half-Fourier acquisition single shot turbo SE T2 weighted pulse sequence (HASTE). The participants were asked to lie with pelvises near the marked centre of the tube and not to move during imaging. To increase the space in the tube, the table was removed: the internal diameter of the tube is then 50 cm. Imaging was first done in a 1.5 Tesla Philips magnet system (Gyroscan S15) and later in a 1.5 Tesla magnet system from Siemens Vision. An improvised curtain covered the window between the two rooms, so the intercom was the only means of communication. The tube in which the couple would have intercourse stood in a room next to a control room where the searchers were sitting behind the scanning console and screen. After written informed consent had been obtained, the participants were invited to come for a scan when the equipment was available on a Saturday. Participants were assured confidentiality, privacy, anonymity, and the possibility of withdrawing from the study at any time. The experimental procedure was explained in a letter sent to respondents along with an informed consent form. Respondents were invited to participate if they met the following criteria: older than 18 years, intact uterus and ovaries, and a small to average weight/height index. The participants (pairs of men and women) were recruited by personal invitation and through a local scientific television programme. The aim of the study was initially to find out whether taking images of the male and female genitals during coitus is feasible, and later whether former and current ideas about the anatomy during sexual intercourse and during female sexual arousal are based on assumptions or on facts. Magnetic resonance imaging had already been used as a diagnostic tool to study erectile impotence 7 it is particularly attractive for this kind of study because it produces images with exquisite anatomical detail that are clearer than those obtained with ultrasonography or radiography, and-as far as we know-it is safe. We decided to try, as an ad hoc “instrument-oriented” study, despite the unscientific and other irrelevant reactions we expected and received: honi soit, qui mal y pense.
#XRAY VISION GIRL PROFESSIONAL#
Our search started in 1991 when one of us (PvA) saw a black and white slide of a midsagittal magnetic resonance image of the mouth and throat of a professional singer who was singing “aaa.” He remembered Leonardo's drawing and wondered whether it would be possible to take such an image of human coitus. We used magnetic resonance imaging to study the anatomy and physiology of human sexual intercourse. 6 The images were of relatively poor quality as they used hand held, self scanning equipment, and none of the images was overview. In 1992 Riley et al published an ultrasound study on copulation. However, they qualified their presumption: “In view of the artificial nature of the equipment, legitimate issue may be raised with the integrity of observed reaction patterns.” 4 Masters and Johnson presumed that the greater volume of the uterus was due to engorgement with blood.
When sexual excitement without orgasm occurred, the volume returned to normal in 30-60 minutes.
This increase disappeared 10-20 minutes after orgasm. 4, 5 Their most remarkable observations regarding sexual arousal in the woman were the backwards and upwards movements of the anterior vaginal wall (vaginal tenting) and a 50-100% greater volume of the uterus.
In the 1960s Masters and Johnson made their assessments with an artificial penis that could mechanically imitate natural coitus and by “direct observation”-the introduction of a speculum and bimanual palpation. Midsagittal image of the anatomy of sexual intercourse envisaged by R L Dickinson and drawn by R S Kendall 3
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