Metra Electronics DAT Combo Bedienungsanleitung PDF herunterladen (Seite 35)

Some advances

in medical

elec-

tronics

fall in

the evolutionary

(rather

than

revolutionary)

cat-

egory,

with recent

improvements

in

X -ray

equipment

a prime

example.

X -ray

installation

at

right dates

from

the

late '20s

and

consists

of

a

vertical

fluoro-

scope

in conjunction

with a

radio-

graphic

table,

with

the same

power

source

being

used

for

each.

Note

that

over

-table

tube

is

still of

the non-

shockproof

type,

with

exposed

high

-tension

leads.

Modern

X -ray

installation

(at

left)

conceals

X -ray

tube

in

rayproof

body

of

enclosed

table,

while

image

is

now

made

thou-

sands

of

times

brighter

by

means

of

image

intensifier

on

deck

extending

across

table.

Further,

over

-table

X -ray

tube

is supported

on

telescoping

column,

in

turn

suspended

from

overhead

carriage

traveling

on

ceiling

racks.

Resulting

arrangement

permits

rapid

positioning

and

angulation

of

X -ray

tube.

saver

supplying

emergency

information

is

nuclear.

A surgeon

may need

to

know

be-

fore an

operation

if a patient

needs a

trans-

fusion,

what kind

of anesthetic

may

be

best,

and

whether

or not

the

heart

is getting

enough blood.

To

answer

these questions,

Picker

X -Ray

built a

machine

it

calls a "Hemolitre."

This

unit

shows just

how

much

blood

is circulat-

ing

in a patient,

information

that can

mean

the difference

between

life

and death

in

heart

cases,

serious

surgery,

or an automobile

ac-

cident

emergency.

Picker

does

it

by tagging

a

small amount

of

serum

with a radioactive

substance

such

as

Iodine

131

which

is then

injected

into a

patient's

bloodstream.

A few minutes

later,

a

small

sample

of

blood

is

withdrawn.

The

Hemolitre

then

calculates

the

radioactive

po-

tency

of the

blood before

and

after

the

in-

jection,

as

well as

the

radioactivity

of

the

serum

itself.

This information

is then

fed

into a com-

puter

which spins its

electronic gears

and

ultimately

reveals

what the

doctors

want to

know

on

its front

panel.

FEBRUARY-

MARCH, 1967

Chair

Is Examiner.

Philco

isn't

that

for-

mal.

Their

engineers

at Western

Develop-

ment

Laboratories

division

at

Palo

Alto,

California,

have

developed

a

diagnostic

chair.

Once

a patient

is

comfortably

seated,

the chair

picks

up respiration

rate, pulse

rate,

heart

sounds,

and

electrocardiograph

read-

ings, then records

the

data

on

graph

paper

-

all

without the patient's

knowledge!

While the

Philco

sensor

chair

borrows

its

tricks

from space

research,

a new

develop-

ment

at

RCA

was

once

in the

Army.

The

image

amplifier,

adding

amplification

and

TV

skills

to

the already

powerful

electron

microscope,

is a

direct

descendant

of the

World

War

II "Snooperscope."

Combined

with

an

image

orthicon,

it

gives

50,000

times

the

light

gain

of the

conventional

stu-

dio

camera.

The

very

intense

intensifier

can

now see

and

record

images

too

faint

to be

seen

by

an

electron

microscope

alone,

and

it

will

even

record

them

for

TV

tape

or

film playback.

Honorary

RCA

Vice President

Dr.

Alfred

N.

Goldsmith

calls

the

new amplifier

"among

the most

powerful

and

useful

electronic

de-

39

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 113 114

Kommentare zu diesen Handbüchern

Keine Kommentare