Related by context. Frequent words. (Click for all words.) 71 CT scan 70 CAT scans 70 CT scanning 69 MRI scans 69 MRIs 62 PET scans 60 biopsies 60 computed tomography 60 x rays 60 magnetic resonance imaging 59 CAT scan 59 scans 59 X ray 59 CT scanner 58 echocardiogram 58 chest X rays 58 CT scanners 57 angiography 57 biopsy 57 echocardiography 57 PET scan 56 X rays 56 colonoscopies 56 colonoscopy 55 ultrasounds 55 angiogram 55 MRI 54 ultrasound 54 surgical procedures 54 radiologist 54 radiologists 54 radiation therapy 53 mammography 53 cardiac catheterization 53 x ray 52 imaging 52 MRI scan 52 Radiologists 52 invasive procedures 51 mammograms 51 brain scans 51 chest X ray 51 Ultrasound 51 PET CT 50 angioplasties 50 radiology 50 catheterization 50 radiographs 49 ultrasound imaging 49 surgeries 49 virtual colonoscopy 49 surgery 49 endoscopy 48 mammogram 48 diagnostic tests 48 cardiologists 48 keyhole surgery 48 rectal cancer 48 colon cancer screening 48 invasive procedure 48 IMRT 48 cardiac surgery 47 Pap smear 47 SPECT 47 radiotherapy 47 scan 47 cytology 47 minimally invasive surgery 46 Radiology 46 radiography 46 laparoscopy 46 magnetic resonance 46 noninvasive 46 diagnoses 46 imaging modalities 46 angioplasty 46 minimally invasive procedures 46 surgical procedure 46 digital mammography 46 sonography 45 hysterectomy 45 lung tumors 45 positron emission tomography PET 45 endoscopes 45 hysterectomies 45 colorectal 45 amniocentesis 45 mastectomies 45 Magnetic Resonance Imaging 45 neurosurgery 45 doctors 44 histology 44 Surgery 44 orthopedic surgery 44 diagnostic imaging 44 surgeons 44 radiation exposure 44 stenting 44 Scans 44 cardiac 44 prostate