Related by context. Frequent words. (Click for all words.) 59 CT scan 56 CAT scan 53 biopsy 52 colonoscopy 52 chest X rays 51 CT scans 51 PET scan 48 CAT scans 47 echocardiogram 47 biopsies 47 angiogram 47 Pap smear 47 mammogram 47 MRIs 46 X ray 44 ultrasound 44 scans 44 cardiac catheterization 44 x rays 44 X rays 43 EKG 43 x ray 43 angiography 43 sputum 43 routine checkup 42 sonogram 42 electrocardiogram 42 diagnoses 42 MRI 42 Pap test 42 prostate specific antigen 42 MRI scan 42 checkup 41 PET scans 41 diagnosis 40 pap smears 40 endoscopy 40 chemo 40 doctor 40 MRI scans 39 radiation therapy 39 cytology 39 computed tomography 39 ultrasounds 39 colonoscopies 39 radiologist 39 mammograms 39 catheterization 38 scan 38 chemotherapy 38 radiographs 38 polyp 38 Colonoscopy 38 radiation treatments 38 Pap tests 38 echocardiography 38 abnormalities 38 sonograms 38 virtual colonoscopy 38 radon 38 amniocentesis 37 millisieverts 37 stool samples 37 undergo chemotherapy 37 polyps 37 appendicitis 37 regular checkups 37 checkups 37 Pap smears 37 thallium 37 tests 37 oncologist 37 Pap 36 lesion 36 hysterectomy 36 diagnostic tests 36 hygienist 36 abnormality 36 urinalysis 36 autopsy 36 radiation 36 cysts 36 ECG 36 MRI exam 36 X ray machine 36 diagnostic 36 thyroid 36 chest compressions 36 lesions 36 saline solution 35 nodules 35 dense breasts 35 radiation exposure 35 urine tests 35 invasive procedure 35 blood transfusions 35 radioactive substance 35 carcinoma 35 ultrasound imaging 35 radiotherapy 35 doctors