Medical Imaging Technology. Producing Images of Organs and Tissues Medical imaging allows doctors to...
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Medical Imaging Technology. Producing Images of Organs and Tissues Medical imaging allows doctors to see within the human body so that they can diagnose
Producing Images of Organs and Tissues Medical imaging allows
doctors to see within the human body so that they can diagnose and
treat diseases or ailments. Today we will be looking at different
imaging technologies that doctors can use to look inside the human
body
Slide 3
X-Ray X-Ray is high energy radiation that can penetrate skin
and tissues but that can not penetrate metals and bone X-Ray
radiographs can be anaylzed for broken bones, structure of blood
vessels and arteries, and lungs abnormalities Associated risks with
X-rays: Can cause changes and mutations to DNA lead apron
Slide 4
Fluoroscopy Uses a continuous beam of X-Rays to produce images
that show movement of organs ex. Stomach, intestine, colon. The
blood vessels can also be studied, called an angiogram. A dye is
injected into the patient, and the blood flow can be seen by the
doctor, this will demonstrate any blockages or narrowing of
arteries Barium or iodine is ingested in to the patient
Slide 5
Ultrasound high-frequency sound waves to produce images of body
tissues and organs. Soundwaves enter the body and are reflected
back by internal body structures Study soft tissue and major organs
Study developing fetus to check for abnormalities Guides the needle
during a biopsy or for amniotic fluid No documented risks
Slide 6
Computed Tomography (CT) CT or CAT using X-ray equipment to
form a three dimensional image from a series of images taken at
different angles of the body Diagnose cancer, abnormalities to
skeletal system, vascular diseases Image bone, soft tissue and
blood vessels all at same time, and is a quick and painless process
CT of head can detect bleeding of brain
Slide 7
Magnetic Resonance Imaging (MRI) uses powerful magnets and
radio waves to produce detailed images of the body Image structure
and function of brain, heart and liver, soft tissues and insides of
bones Diagnose cancer, brain diseases, and cardiovascular
conditions No documented risks
Slide 8
Biophotonics uses the interactions of light with cells and
tissues. Light shines on cells, the particles of light are
scattered by atoms in the molecules of the cells. A special imaging
device records these scatter patterns. The molecules in abnormal
cells create different scatter patterns than normal cells. Use
endoscope to explore digestive tract (colonoscopy) endoscopic
surgeries require smaller incisions and shorter recovery
Slide 9
Decisions and Diagnosis Factors involved for appropriate
treatment: Doctor ordering correct test Patient understanding the
reasoning of the test Technician administering the test correctly
Proper funding Location
Slide 10
Questions What is an angiogram What are some limitations with
the use of X-ray technologies How are x-rays used in the treatment
of cancer? What information can be provided by a chest radiograph?
A patient is suspected of having bone cancer. Explain whether or
not ultrasound is a good imaging tool for diagnosing bone
cancer.
Slide 11
Public health strategies Immunization Programs: vaccinations or
immunizations: protects individuals and societies as a whole.
Influenza, H1N1, mumps, measles, polio, tetanus, rubella, HPV
HIV/AIDS vaccine development over 33 million people are infected
with HIV Screening Programs: DNA Screening: identify people who
have high risk factors, early detection DNA screen in search of
genetic markers which signal disease
Slide 12
Public health strategies Promoting Health Lifestyles: Smoke
free environments proper diet, Canadian Food guide, encouraging
physical activity, weight control
Slide 13
Public health strategies Promoting Public Awareness: Protecting
from sun and reducing skin cancer sunscreen lotion for UV ray
protection, hats, sun glasses, long clothing West Nile virus
minimize exposure to mosquitoes during active periods, remove
sources of standing water, DEET Informing public of statistics such
as rates of occurrence leads to more public awareness and
precautionary measures.
Slide 14
Questions What is the most commonly administered vaccine in
Ontario? Define HIV and AIDS and show the relationship between the
two terms Explain what might happen to you if you were bitten by a
mosquito carrying the west Nile virus Describe some public health
strategies used to promote healthy living in Ontario.