Handheld ultrasound imaging provides real-time, noninvasive imaging in variable and even nonclinical environments. The development of increasingly portable, handheld ultrasound devices, and the iteration of increasingly user-friendly interfaces, has made sonography an accessible technique for even early practitioners. 22 In spaceflight, ultrasound is commonly used given relatively lightweight imaging options, broad applications for multiple uses, and relative ease of use. 11 , 14 , 16 Currently, ultrasound is the only imaging capability available on the