your father probably had minor sensory stroke in the last week. The white spots
that you are describing on MRI may be indicator of reduced blood supply to those areas causing damage. Frequent stroke within such a short span is a cause of concern. the common risk factors which need to be taken care of are - high blood pressure
, diabetes, high cholesterol
and smoking. Pelvic and abdominal ultrasound
is done for a variety of reasons which may be directly or indirectly related to patient's disease. You can clarify with treating doctor before going ahead with these tests.