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First stage
Physics
Lec-1
9/12/2015
.د
تيماء
Introduction to Medical Physics
Medical Physics
is the application of the concept of physics in medicine
Aims of the Medical physics Application of the concepts and methods of physics
to understanding the function of human body in health and disease
physics
Medical
1 .Physics of the body is to understanding physical aspect of the body
such as ; forces on and in the body , work , energy ,power of the body, heat ,blood flow ,
respiration , electricity , ,circulation, and hearing
2.Application of physics in medicine
Medical physics Techniques are used for
Diagnostic :
Stethoscope
Manometer (blood pressure )
Sphygmomanometer
Electrocardiograph(ECG),
X- Ray,
Electroencephalograph(EEG),
Electromyography (EMG) ,
thyroid function using I¹³¹
Computer tomography (CT scan ) ,
Ultrasound , tuning Fork,
Imaging Magnetic Resonance (IMR),
Flow meter ,
Spirometer to study the function lungs,
Audiometer,
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Optics,
Laser,
Gamma camera to study the function of kidney ,liver ,and lungs .
Radiotherapy
Cobalt sixty( Co sixty )
High voltage
Ultrasound
infrared
Radio frequency
Heating
Laser
b. Therapy
c. Patient monitoring
ECG , spirometer , blood pressure ,and thermometer
SI Unit
SI units: Two types of SI units
1.Physical unit
a. MKS system
M = mass
K = Kilogram
S = Second
b. CGS system
C = centimeter
G = gram
S = second
Force in MKS Newton
CGS dyne
Energy Joule
erg
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2 .Physiological unit
In medicine it is often convenient to measure quantities in nonstandard units.
For example :the physical units of pressure is newtons per square meter ,
blood pressure is expressed in
millimeter of mercury ( Hg)
Non Standard Unit
Pressure = mm Hg
Time = minute
Energy = calorie
Heart rate = pulse / minute
Another example ; pulse rate measure in pulse per min