sonograafi

pratidhvani-impals sonograafi ka yojanaamoolak chitr

sonograafi ya altraasonograafi, chikitseeya nidaan (diagnostics) ka ek mahatvapoorn saadhan hai. yeh paraashravya dhvani par aadhaarit ek chitraankan (imejing) takaneek hai. chikitsa kshetr mein iske kai upayog hain jismein se garbhaavastha mein garbhasth shishu ke svaasthya ke baare mein jaankaari ki praapti sarvaadhik jaaneemaani hai.

bhautiki mein aisi tarango ko paraashravya kehte hain jo maanav ke kaanon se sunane yogya aavruti se adhik ki ho. praaya: 20 hajaar harts se adhik aavrutti ki tarangon ko paraashravya kaha jaata hai. vaastav mein nidaan ke liye prayukt paraashravya censor praaya: 2 se 18 megaaharts par kaam karte hain jo ki maanav dvaara sunane yogya aavrutti se saikadon guna adhik hai. adhik aavrutti ki paraashravya tarang kam gaharaai tak ghus paati hai lekin isse bana chitr adhik spasht (adhik rijolooshan wala) hota hai. [[chitr:3dultrasound.png|thumb|right|29 saptaah ke garbhasth shishu ka 3D paraashravya tarang ka upayog panadubbi chalaane ke liye kiya jaata hai

kisi paraashravya utpaadak srot (traansadyoosar) ke dvaara utpann tarang jab shareer ke andar gaman karti hai to shareer ke vibhinn bhaag ise kam ya adhik maatra mein lauta dete (paraavartit/riflekt) hain. in lauti hui tarangon ko ek skainar mein liya jaata hai jo inhein vidyut sanketon mein badal deta hai. fir ye vidyut sanket ek sanganak (computer) mein jaate hain jo aavashyak ganana karke upayukt chhavi (imej) ka nirmaan karta hai.

• tribimeeya paraashravya (3D Ultrasound)

• American Institute of Ultrasound in Medicine Professional Association
• About the discovery of medical ultrasonography
• History of medical sonography (ultrasound)
• Procedures in Ultrasound (Sonography) for patients, from RadiologyInfo.org
• Manuals of medical ultrasound from University of Rochester Medical Center
• Ultrasound Can Affect Fetal Brain Development
• Careers in the vascular ultrasound field
• Sonography of the female pelvic floor:clinical indications and techniques Illustrate the clinical utility of this non-invasive diagnostic technique.