Film Review
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each of the black spaces below before clicking
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| show | cross over
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| -substratum coat, used to glue emulsion to base -prevents bubbles during handling and processing | show 🗑
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| -made of gelatin -actually captures latent image -colloidal substance -chemically non reactive -distributes crystals evenly(prevents clumping=mottle) -clear, flexible -contains silver halide crystals | show 🗑
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| show | mammography
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| show | identifies the batch of film (batch #)
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| show | -glass until WW1 -cellulose nitrate after WW1(flamable -cellulose tiacetate in 1920's(called safety film because it was non-flamable, but it tore easily) -beginnigng in the 1960's we started using polyester based film
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| provides mechanical support -inflamable -non-tear -flexible -stable/rigid -uniform lunicy -blue tint to reduce eye strain -archival quality | show 🗑
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| -photosensitive agents in film | show 🗑
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| show | silver halide crystals used in film today
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| show | -cubic -octhedral -polyhedral -irregular
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| show | -has lattice formation -chemically combined with ionic bonds(+ charged silver ions and - charged bromide and iodide ions) -each crystal has a point of imperfection called the sensitivity speck,this allows for latent image acquisition
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| what are sensitivity specks made of | show 🗑
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| what are the clsifications of film | show 🗑
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| -most common -sensitive to all colors -uses red safe light | show 🗑
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| -not sensitive to red light spectrum -uses red safelight -green sensitive | show 🗑
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| -uses amber color safelight -used with older tungsten screens(mammography) | show 🗑
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| -hard protective gelatin -prevents soft emulsion from sctratches, etc. -antistatic -do not paper clip or staple processed images=scratch | show 🗑
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| show | dyes
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| show | -resolution -speed -contrast -latitude
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| show | resolution
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| show | -speed(aka sensitivity *more silver=higher speed *thicker emulsion layer gives more silver(speed), but less resolution
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| ability to image density differences | show 🗑
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| show | latitude *higher contrast=less latitude
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| what kind of film would be used for chest and abdominal imaging | show 🗑
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| what kind of film would you use for bone work | show 🗑
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| what is the purpose of film screens | show 🗑
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| -does not require use of screen -today it is used in manufacturing | show 🗑
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| show | screen film
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| -used for copies of digital images | show 🗑
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| show | duplication film
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| show | subtraction film
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| -used to show movement frame by frame | show 🗑
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| -rolls of small film use to take blown up spot images | show 🗑
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| show | -inventory(first in first out) -sensitive to heat and humidity, radiation and light -store on end -static artifacts if too dry -store at <68 degrees 30-60% humidity -store 18 months unopened -store for 45-60 days once open
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| show | contains: -date -pt name -MR # -intitution name -exposed by xray or light -do not write on
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| show | -green film-unprocessed -clear film-processed -black film-exposed to white light before processing -diagnostic film-regular film with an image on it
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| show | -tube side-radiolucent -back side-radiopaque -blocker-pt info -purpose-light tight and good film/screen contact
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| show | at least 4ft from loading bench
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| what are the four main steps of the latent image formation Gurney-Mott hypothesis in film screen | show 🗑
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| what are the different types of static artifact | show 🗑
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| what are some things film is sensitive to | show 🗑
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| what is the main difference between direct exposure and screen film | show 🗑
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| show | 1.make a light exposure on a film 2.take in a dark room with no lights on 3.cover half off film with lead 4.turn on safe light for 30 seconds 5.turn light of and process film 6.you can then see if there is fog or not
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Created by:
bigad1982
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