Woww thankyou for wonderful explanation @"PJ-Certified VK Teacher" didi.
@Chetandurdi sharing as per my personal experiences on scanning or diagnose of the affected body part/ organ can be done very easily with as described by didi in the comment above.
As a new begginer if you try this on your palm than it will more easy to get you noted and experience. Please do slow rotations and you will feel vibrations in case of more energy need for an organ it will be huge sensation and when the tingling/vibrations get stops it means the required energy is sent by VK.
By practicing you can diagnose directly on rotating VK over body for self or others.
VK is such an amazing invention by @"Sharat Sir-VK Inventor" ji we can diagnose through VK simply without going for any machines.
Must share your experiences with us and please keep experimenting.